Great game, I bought it and I'm having a lot of fun with it. Just some suggestions:
-When you are playing it's easy to forget which weapon you are carrying with each hand, I died many times just for pressing the wrong one. It'd be nice to have some kind of indicator on screen.
-Release a demo, seriously, there's no much info about the game and a simple demo will get more people to buy the game.
-Market a bit your game or have someone else do it for you, seriously, you have a good product but your website looks a bit poor, give us reasons to buy it and send a couple of e-mails (indiegames.com will probably feature it if you contact them).
P.D.: I keep dying after beating the first 3 stages >.<, I'll have to practice more.