When you play, numbers will fall from the sky. You need to use the numbers to add up to twenty; that's what the "You have:" box at the top left is for. Your score is at the bottom. Remember! Don't go over twenty, that will lead to your demise. Click flag twice to start. Use WASD or arrow keys
Update 2: Now there is a half circle. If it touches you, your score gets cut in half. There is also a round feature. I thought it would be annoying to have a forever lasting decimal, so this rounds your score. More types of Trigle too!!! Update 3: Pre-play screen A and D keys added for movement X'ed circle. Resets your "You have" Rotating circles while falling.