Written by Coolmath Games has been a favorite for years. It’s full of fun stuff that also keeps your brain active. In 2025, some of the best games are still the old ones that just keep hitting right.
These are my top 5 games on the site right now. Each one has something that makes it stand out. I’ve played them all and I’m here to tell you why they’re worth your time.
Top 5 Coolmath Games to Play in 2025
1. Run 3
Run 3 has been around for a while. You play as a small alien running through space tunnels. The tunnel breaks apart as you run. There are gaps and holes you need to avoid. But here’s the twist, if you run on the wall, the whole world rotates. It flips your mind a bit but in a good way.
Game Information:
- Name: Run 3
- Developer/Publisher: Player 03
- Release Date: Around 2013-2014 (original), Coolmath Games release Oct 10, 2017
- Genre: Endless runner, platformer
- Platforms: Browser (HTML5)
- Game Modes: Explore Mode, Infinite Mode
- Gameplay Features: Gravity-shifting tunnels, character abilities, power cells, rotating world mechanics
- Flash Support: Converted from Flash to HTML5 for continued playability
You start with one character, but as you go, you unlock more. Each one has different moves. Some jump high, others move fast, and some float. I like switching them up to beat tricky levels. There are two ways to play. Explore Mode gives you levels that feel like a story. Infinite Mode is non-stop running until you fall. Both are fun, but I lean toward Explore Mode because I like having a goal.
It’s super easy to play. Just use the arrow keys and spacebar. You don’t need a mouse or anything fancy. The game looks clean, with a simple design that keeps your focus on the action. Even after all these years, it runs smooth on most computers.
I’ve played it so many times and still get pulled in. There’s something about making the perfect jump or unlocking a new path that feels great. The music is chill, and there’s no pressure to win fast. You play at your own pace. It’s the kind of game that keeps you saying, “Just one more level.”
Run 3 has a ton of replay value. The gravity-flipping is super cool and makes it different from every other runner game. It’s easy to learn and still challenging later on. The only real downside is that it gets tough. Some parts will make you want to throw your keyboard. Also, unlocking every character takes time.
Rating: 9/10
Play Here: Run 3 on Coolmath Games
2. Fireboy and Watergirl in The Forest Temple
Fireboy and Watergirl is one of the best co-op puzzle games ever made. You control two characters: Fireboy and Watergirl. Fireboy can’t touch water, and Watergirl can’t touch fire. Each level is like a maze full of switches, buttons, and traps. You need to move both characters to the doors to complete the level.
Game Information:
- Name: Fireboy and Watergirl in The Forest Temple
- Developer/Publisher: Oslo Albet / Max Games Studios
- Release Date: 2012
- Genre: Puzzle, Platformer, Cooperative
- Platforms: Browser (HTML5)
- Game Modes: Single-player (dual control), Local multiplayer (2 players)
- Gameplay Features: Dual-character control, puzzle-solving, teamwork mechanics, environmental hazards (fire, water, lava), collectible gems, switches, portals
You can play by yourself using one set of keys for Fireboy and another for Watergirl. But it’s way more fun with a friend. You each take a character and help each other. Some parts need perfect timing, like one player holding a button while the other runs through a door.
It makes you think, but it never feels impossible. That’s what makes it good. You learn something from each try. I’ve played it solo and with friends. Playing with someone else is better, no question. You talk, plan, and laugh when someone falls in the lava.
The design is simple but nice. You can see everything clearly. There’s also this gem-collecting thing that makes you go back to old levels and try to get a perfect run.
Fireboy and Watergirl is perfect for two players. It teaches teamwork without feeling like school. You solve puzzles without getting stuck forever. If you’re playing solo though, using two sets of keys can get tricky. Also, once you finish all the levels, there’s not much to go back for unless you want to get all the gems.
Rating: 8.5/10
Play Here: Fireboy and Watergirl: Forest Temple
Deal of the Day: 47% Discount on Hogwarts Legacy PS5
Also Read: Top 5 Free Browser Games 2025 (No Download)
3. Chess
Chess on Coolmath is clean and simple. You can choose to play against the computer or another person sitting next to you. The AI has different levels, so you can go easy or try to challenge yourself. I like that it shows move suggestions. It helps when you’re still learning the game.
Game Information:
- Name: Chess
- Developer/Publisher: Various (adapted for Coolmath Games platform)
- Release Date: Longstanding classic; Coolmath Games version available for many years, updated to HTML5 post-Flash era
- Genre: Strategy, Board Game
- Platforms: Browser (HTML5)
- Game Modes: Single-player (vs. AI with difficulty levels), Local multiplayer (two players)
- Gameplay Features: Standard chess rules, move suggestions, undo moves, tutorials, timed matches
The board looks nice and uncluttered. No ads or bright lights. Just chess. There’s also an undo button. I use it a lot when I make a dumb move. It doesn’t make you feel bad. It just helps you see what you could’ve done better. That’s great for learning. Plus, there are short tutorials and tips if you’re new.
If you’ve never played chess, this version is a great way to start. The controls are smooth. You just click the piece and then click where you want to move it. It doesn’t let you make illegal moves, which saves you from getting confused.
What I like most is the timer option. You can play a fast match or take your time. It fits your mood. It’s also fun to play against friends in person. The local multiplayer is easy and works right from the same screen.
The chess game is great for practice and learning. The undo and move tips are super helpful. It’s easy to use and works well even on older computers. On the downside, the graphics are plain, and the AI doesn’t always act smart at lower levels. If you’re a serious chess player, you might find it too simple.
Rating: 8/10
Play Here: Play Chess on Coolmath
4. Moto X3M
Moto X3M is wild in the best way. You ride a dirt bike through crazy tracks filled with spikes, saws, and explosions. It’s not about just getting to the end, it’s about doing flips, racing the clock, and surviving some ridiculous jumps.
You hit ramps and flip through the air, and somehow land it just right. Or sometimes you don’t, and your rider just crashes in a funny way.
Game Information:
- Name: Moto X3M
- Developer/Publisher: MadPuffers
- Release Date: 2016
- Genre: Racing, Platformer, Stunt
- Platforms: Browser (HTML5), Mobile (iOS, Android)
- Game Modes: Single-player
- Gameplay Features: Timed obstacle courses, stunt performing (frontflips, backflips), star-based level progression, environments, intuitive controls
The controls are simple. Arrow keys for moving and leaning your bike. The harder part is mastering the timing. You need to know when to go fast and when to hold back. Some levels have moving parts or traps that trigger if you go too soon. It makes you think but keeps it fun.
What I really like is the speed. The game moves fast and keeps you coming back. You can finish a level in under a minute, but getting three stars means doing it perfectly. I’ve spent way too much time trying to shave off a second. It’s that kind of game.
There’s a good mix of level design too. Some are all about tricks, others need perfect timing. There are even underwater levels and winter maps. The vibe changes just enough to keep it from feeling the same. It’s flashy without being over the top.
Moto X3M is super fun and always gives you a little rush. The levels are short, but they pull you in. It’s great for quick breaks or long play sessions. The downside? Some levels get frustrating. You’ll crash a lot until you figure them out. But that’s also part of the fun.
Rating: 9/10
Play Here: Moto X3M on Coolmath
5. Tiny Fishing
Tiny Fishing is one of those games you start playing and suddenly 30 minutes have passed. It’s a calm, click-based fishing game that slowly gets more addictive as you upgrade your gear.
You drop your line into the water, try to hook as many fish as you can on the way up, and earn money from each catch. Then you use that cash to upgrade your line length, the number of fish you can grab, and how much money each fish is worth.
Game Information:
- Name: Tiny Fishing
- Developer/Publisher: Coolmath Games
- Release Date: Mid-2010s (approximate)
- Genre: Idle, Casual
- Platforms: Browser (HTML5)
- Game Modes: Single-player
- Gameplay Features: Fishing mechanics, incremental upgrades, equipment upgrades, exploration of fishing spots, relaxing ambient sounds
It’s super simple to play, click to drop the line, drag left and right to hook fish, and that’s it. But the upgrades make it feel like you’re always making progress.
There’s no rush or time pressure. You can just relax and enjoy pulling up colorful fish. The sound design is soft and calm.
I found myself coming back to Tiny Fishing during breaks or when I wanted something low-key. It’s a great stress reliever. You don’t have to think hard, but it still feels good when you catch rare fish or unlock deeper waters. It scratches that itch of watching numbers go up in a very satisfying way.
Tiny Fishing is great for people who want a break from fast games. It’s peaceful, easy to play, and always gives you a little reward. On the downside, it can feel repetitive after a while, and the gameplay doesn’t really change much. But for a chill game to keep your hands busy, it hits the spot.
Rating: 8/10
Play Here: Tiny Fishing on Coolmath
FAQs
Q: Is Run 3 still playable without Flash?
A: Yes, it’s been updated to HTML5 so it works in all modern browsers.
Q: Can you save your progress?
A: Yes, if you create a free account on Coolmath, your progress gets saved.
Q: Is it better to play with a keyboard or touchscreen?
A: Keyboard is better. The controls are designed for arrow keys and spacebar.
Q: Can you play with two people on one keyboard?
A: Yes. One player uses arrow keys, the other uses A, W, and D.
Q: Is there a way to play online with a friend?
A: Not on Coolmath. It’s only local multiplayer.
Q: Is this game good for younger kids?
A: Yes. It teaches logic and timing in a fun way.
Q: Does it follow the official chess rules?
A: Yes. Every rule, including castling and en passant, is supported.
Q: Can I play timed games?
A: Yes. You can pick a timer if you want a fast or slow game.
Q: Can I play against real people?
A: Yes, but only locally. No online multiplayer.
Q: Can I play Moto X3M on my phone?
A: Yes. It’s available on both iOS and Android.
Q: Do you need to do tricks to win?
A: Not really. Tricks give bonus time, but finishing the level is what counts.
Q: Can I skip levels?
A: No, you unlock them one by one.
Q: Can I lose in Tiny Fishing?
A: No, there’s no losing. Just catch what you can and keep upgrading.
Q: Do I need an account to save my game?
A: Yes. You’ll need to sign in to save your progress.
Q: Is Tiny Fishing good for younger kids?
A: Yes, it’s easy to understand and safe for all ages.
🧠 Which Coolmath Game is your favorite in 2025?
Also Read: Top 5 PS5 Games Releasing in May 2025