Engine done, working on enemies, bosses, and the like.

Right now you're just a small 30x30 square jumping around a grass tile level.
You can shoot though. I want upgrading your gun to be a big part of the gameplay, so I might have some sort of parts system, and you get more parts from defeating enemies, or just find them in hard-to-reach places, sort of like Robot Wants or KOLM. Another thing I've implemented is that higher-capacity magazines are all multiples of 9. You start out with a magazine that can hold 9 bullets. Once you upgrade your gun this number jumps to 18, then 27, and so on.