Guess the color (red, blue, yellow, or green) that you think the arrow will land on and then wait. If the color you chose matches the color that the spinner touches, then you're right. If not, you're wrong. I have fixed most of the previous mistakes.
All I did was make it a game by adding in a Money system, lives and an Ending. Oh and I added in some sounds :) This project has an ending when you have no more lives so bare with it.