I didn't get to play a lot of your game, but I can give a few comments about my first impression nonetheless :)
There's no explanation of the controls anywhere. A simple "use the arrow keys" written somewhere in the main-menu would fix that :D
Another thing: It took around 5-10 seconds everytime I reloaded after dying. This is only me guessing, but I think there might be a performance bottleneck making the game slow when creating the level - maybe there's some optimization that could be done to improve that loading speed? I had somewhat of a similar issue while developing my game.