Good choice of music. The sound effects for the enemies are way too loud, though.
I like the idea of the game, but I think the reloading isn't necessary. It's a challenge enough for players to navigate the level with a control scheme that they may not necessarily be used to in platformers, ie. pressing the key you want to go in actually sends you in the other direction. Combining this with the need to constantly reload and the controls, not to mention the sounds, become overkill.
Personally I think the challenges are good, but the reload is not useful. Especially since you can reload an unlimited number of times anyway.