Press the green flag at the top next to the red octogan to start the game. Use the up and down keys to hit as many yellow/green (1 point) coins and as many blue (2 point) coins as you can.
Zcraftincreeper inspired me to do this project as he made a Gravity falls to but his failed so he had to unshare it. But the best thing is that I am re-creating it for him.