OK, so if you're handling things that way you're probably after vector graphics which can handle that sort of thing, as opposed to raster (say, rendered 3D or pixel art).  That is important info to include so you can get the right people interested.

Hey guys!  I appreciate the comments and suggestions.  Ice comes in a variety of textures and colorations, of course; I was imagining the original as somewhere between translucent blue glacial ice and more familiar colorless, clear ice as in an icicle, in either case with some smooth and some flat-polished surfaces. But I just made the palette up as I went along and didn't do much polishing because I was posting it just after midnight on the due date and just wanted to get something in.  I might go back and make a few more versions incorporating your suggestions--depending, alas, on my increasingly busy school schedule.  Or, of course, I welcome your modifications as well, and if you'd like I can add them to the post.
@Mumu: xD, those look hiliariawesome.

Good job!  Simple but very effective.

I have enjoyed this quite a bit!  The huge increase in content was great, of course, and overall the game just keeps getting better and better.

One thing I found was that it was relatively easy (though not a 100% shot) to abuse corners.  I could hide behind them and strike at lured monsters while not being able to be hit.  This is the only way I could beat the brothers, for instance, though it felt kind of cheap.  Pretty useful for skeletal snipers, though; if you get two of those on your case they are terrifyingly deadly.