It's pretty cool. It's challenging enough to where it is very easy to die if you aren't careful. The art is good and the music/sound effects are fitting. While there are limitations like no jumping or melee attack, it's still fun (I've played other such games with a similar setup that just weren't fun to play so this isn't something that can be easily pulled off). Though I came across some problems/feedback:
- On the level before the final boss, the bazooka and assault rifle switch places in the keyboard setup (the assault rifle was assigned to 3 and the bazooka to 4 on all the other levels that came before it, but on this level, they are reversed). Also, on this level, the bazooka ammo is set back to 0 (is this intentional since you don't want the player to go into the final boss with enough bazooka to take it out fast?). Lastly, there is bazooka ammo in this level on lava that you can't reach.
- I'd recommend adding a skip function at the beginning of the game. The prologue isn't very long, but after playing through the beginning three times, you just want to get past it to the action.
- A pause, mute, and restart function would also be good.
It's been pointed out that there isn't regen health, but I don't see this as a problem; just a difference. The game requires you to basically "get good" and learn from your past mistakes. I beat the game once by the skin of my teeth, but then beat it again, finishing with a lot more health. Also, thank you for letting the health go over 100%; that's awesome!
You did very well on the design of the game and I look forward to seeing more stuff from you!