Mini Games
Perfect Balance
Stack the boxes falling from the sky onto the seesaw without letting them topple! A physics balance survival game about holding the center of gravity.
How to Play
- Boxes drop one at a time onto the seesaw. Each one tips it toward the side where it lands, and heavier boxes farther from the center tip it harder.
- Use the ← → keys or the mouse (on mobile, drag left or right). The side you push goes down, so push against the tilt to level it out.
- If a box slides off the end or the seesaw tips to 45°, it's game over. Your score is the number of seconds you last.
My Best Record
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Last longer to beat your best record!
Ranking
| Rank | Nickname | Score |
|---|---|---|
| Rank | Nickname | Score |
|---|---|---|
- |  You | - |
Your record is only saved in this browser.
Records are not shared across different browsers or devices.
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Perfect Balance is a physics balance game where boxes drop from the sky onto a seesaw and you try to keep it level for as long as you can. Every box has its own size and weight, and it tips the seesaw toward the side where it lands. A heavy box near the end acts like a long lever and pulls much harder than a light one near the middle, so the trick is to watch where the next box is falling and lean the other way before it hits.
The controls are simple. On a computer, hold the ← → arrow keys or move the mouse left and right; on a phone or tablet, drag your finger left or right. The side you push goes down, so you push against the tilt to bring the seesaw back to level. Whenever it leans, the boxes on top slide toward the low side, which is why small, frequent corrections work far better than big swings.
It's game over the moment a box slides off the end or the seesaw tips to 45 degrees. Boxes start falling every 3 seconds, speed up to every 2 seconds after 20 seconds and every 1.5 seconds after 40, and keep getting bigger until the one-minute mark. Your score is the time you survive, measured to a tenth of a second. Your best time goes on the global leaderboard, and you can share a result card to challenge friends. It's free, runs in the browser, and a run takes about a minute.
Frequently Asked Questions
Q. How do you control Perfect Balance?
A. On a computer, use the ← → arrow keys or move the mouse left and right. On mobile, drag left or right. The side you push goes down, so push against the tilt to level the seesaw.
Q. Can I play it on my phone?
A. Yes. It runs in any mobile browser with no download. Drag your finger left or right across the screen to tilt the seesaw; short drags are enough for fine corrections.
Q. When is it game over?
A. The run ends as soon as a box slides off the end of the seesaw or the seesaw tips all the way to 45 degrees.
Q. How is the score calculated?
A. Your score is how long you survive, in seconds to one decimal place. Boxes fall every 3 seconds at first, every 2 seconds after 20 seconds and every 1.5 seconds after 40, and they get bigger over time, so 30 seconds and one minute are good targets.