Lol, I really loved this it was pretty cool! I had 1 minor issue, though. Since I like to use WASD, and Ctrl was set up for fire...I had some mishaps where it would be ctrl+W/A/S/D, and activate a shortcut (usually trying to save the webpage! :P)
I really like the visuals. Are you going to expand it farther? BTW, did you notice that the hearts in your game are nearly identical in shape to the hearts in mine? hahahaha. the colors are different but they look like they were drawn by the same people! I know they can't be, because i did mine. keep up the good work!