Thanks for playing, and for all this great feedback!
I had originally planned at least 5 different weapons, with tons of levels to use them in... but realistically, level design took much, much longer than I had planned for, and even the grenades are implemented only as an afterthought.
The diversity of responses I've received to the combat (too easy, too hard, etc.) show that different players have different tastes. I'll implement varying difficulty levels after the rating period is over.
Zooming out is achievable with little difficulty, but then I don't get to show off the art in the same way. I figured, since the environment is so dark, it wouldn't matter too much. But I can experiment with this.