The art and atmosphere were fantastic, and I really enjoyed the little story snippets. The game's really held back by mechanics though. The shooting is hard to use with the delay and slow bullet speed, and the jumping and movement feel very loose and somewhat out of control. Maybe also consider some effects for shooting and hitting the wasps.
I'm also not really sure how you incorporated the theme as a mechanic here. It's explained in the story as a time machine, but from what I can tell it's basically just a level reset, and feels very poorly implemented.