So I finally got around to catching up on these threads, and found yours. Your game is sweet! I do have some questions/comments, however.
1. Some sound would be excellent!
2. I'm running a 2.6Ghz P4, WinXp, 512MB RAM and the tutorial doesn't work. It kind of starts, then goes back to the main screen.
3. I've played (and beaten) the game a few times now, and am still confused on some things....maybe because my tutorial doesn't work. I'm assuming that the soulstealer deal is what changes your type of gun, but what type of enemy gives you what type of gun?
4. A loading bar of some type between level 1 and level 2 would be GREAT. I couldn't figure out for the longest time if the game had locked up, or if I was just waiting still.
5. I agree with many other people that the game moves too fast. I get the enemies confused with the background often.
6. I also think that the game gets way too hard, way too fast.
7. My top score list doesn't work unless I beat the game. If I die in the middle and use up all the continues, I get a high score of 0.
Overall, I REALLY liked the game. I hope to see an extended version in the near future!