Press the correct arrow key when the moving arrows reach the line at the top of the screen. Press S to switch to blue, and A to switch back to green. The colors of the incoming arrows will frequently change, and you'll need to constantly change your line color to match what the upcoming arrows are. If you manage to get multiple arrows in a row without missing one you can build up a point multiplier. Keeping your multiplier maxed out at all times is your key to attaining a high score, but it will take focus - miss an arrow and your multiplier resets, forcing you to start back over at zero. See how high you can score in this rhythmic game of reflexes!