OK, you warned...
...it was a difficult game. Nonetheless, I play games to entertain myself, not to get strained and lose and entire hour trying to pass the FIRST stage. And I am myself quite an experienced gamer, from the MSX and the first ataris.
Difficulty aside, the game is a bit bugged, you can "climb" on the wall, and jump like spiderman. Aside from the first load, every other time I restar a battle I start off the screen, and take a hit without being able to begin. Have to jump to come back on screen, and with that first hit taken already.
Those "suicide bombers" are a REAL pain, and there is no way to get off of them, but this may not be a bug, just part of that difficulty criticism. Also, the char turns too slowly, and I am not able to change his facing direction without completely stopping, so I get hit from behind without being able to make a quick turn to hit and back. You should make him more "turnable", on the ground and airborne (you can only move him after full high).
Overall, good engine, good graphics, good theme. Awesome music, although that bell thing can get annoying. But, unfortunately, TOO F*CKING HARD. I just got pissed off instead of having fun, see what I mean?
Will take a look at other of your games. Seem promising. =)