It's a solid entry for your first jam, especially if you did this on your own. It took me a long time to figure out the E/Q keys. Maybe I missed something in the first room, but that is one of your core principals and should be very central in the beginning. Unfortunately I think the core mechanic is more annoying than fun and at times I felt like playing 1st person Space Invaders: Move left and right and attack. On the plus side, the different weapons for the colors are a really nice touch :)