Pretty fun game, but I got stuck at the level with the block that moves up and down where you need to grapple onto. Also, I don't see how you included the theme.
The theme is included in later levels. use ESC to skip the level you got stuck on
Oooh, I can just skip levels?
Yeah, the levels after that are pretty difficult as well. The enemies are especially over powered; their animation is quite funny though.
Try shooting the enemies. They don't particularly like that :D