Updated first post with a massive rewrite of the engine, which now has a menu and smaller music files.
Also, a lite version can be downloaded.
The Director's cut version(and the Lite version as well) has less enemy fire being shot, so jumping to dodge enemy fire can actually be an intregal part of gameplay.
EDIT- For some reason unbeknownst to me, the Devans appear more often. I'm going to tinker with some values and see if I can slow down their breeding.