WARNING: I made this game a while ago, so there are a lot of bugs, and I don't feel like going through old, unorganized code and fixing everything, so play at your own risk. There are two parts of the game; in the first part, things run along the track, and you have to shoot them. Also, if you have enough money, buy an upgrade. When you get to the boss fight, use arrow keys to move up and down and click or hold to shoot.