You might want to have a look into how to make a movement controller smoother. The movement is a bit jittery and when moving while looking down can make your eyes tired. Also, it would be nice it the coins would have different values: like 0.50c, $1 etc. I wanted to gather the expensive ones until I realised they are all valued at 1 - i wanted to do that so I can "cheat" my way into trying the store upgrades. Keep it up!