Destroy the flying keys as they appear. When a key hits the pink line, hit the corresponding key on your keyboard to destroy it. This gives you 10 points. If you hit the wrong key or hit the key too early/late, then you'll miss it instead. Misses remove 10 points. Every time a key makes it past the pink line, you lose some health. Lose all of your health, and the game ends. Keys spawn more frequently over time. You can adjust the difficulty in the menu screen to determine what kind of keys spawn and how fast they move. The "Full Keyboard + Shift" difficulty requires you to hold down shift to destroy certain keys. Try to get as many points as you can! Good luck...