Simple clicker game. Press the ball to change clicks. The check and x will change colors. Click the shop for upgrades. However, you don't get the upgrades rights away, you need to get to that score in order for it to work.
What I mean by "you need to get to that score in order for it to work.", is that if the upgrade you want to buy has a cost of 525, then you need a score of 525 or greater in order for your upgrade to work. If you want to remix this project, go ahead. (Especially Undercovernight).