Click on a difficulty to start. The arrow will move to the end of the level layout. Hit the space bar when the arrow is on a numbered circle, and it will give you points (the higher the number, the more points you get,) and then continue to the next round. If you hit a blank circle or you run out of time, it's game over. Clicking on "Disable repetitive sounds" will disable most of the sounds in the game that play on every round.
"Time the Arrow" is a placeholder title. Please give me ideas for names for this game that don't exist already. If you can help me improve the title, I can improve the thumbnail. Thanks.