The world is falling. You need to JUMP to survive. However, to jump, you need to CALCULATE first.

How to play

The right pane will show a question, you need to remember the answer. When the next question shows up, you need to input the answer to the previous question (the answer is from 0 to 9).

If you input the correct answer, you can jump one more time. Otherwise, you lose one opportunity to jump.

The level in the left pane is continuously falling, if the character falls below the screen, the game is over.

Use number keys to input the answer. Use A, and D to move left and right. Use W to jump.

Credit

See https://github.com/sinofp/calculate-to-jump#credit for details.