Click the space bar when you think the line will hit the red marker if you do at the right millisecond you get a point if you do so at the wrong time you lose a point. there is also a world score that works in the same way but it doesn't reset and it is the combined score of every player.
If this project gets over 50 views and the world score gets over 100 points I will have a vote for one of these 3 updates. 1. The UI will become nicer and there will be better graphics as well as certain upgrades. 2. This game will have multiple smaller games in it such as this one. 3. You can choose different designs for the wheel and there will be music and sfx.