(Josh)
Very well done! I loved the art and audio, and there was a surprising amount of content packed into the game. (I might be a bit jealous. :) )
The jump and air movement didn't feel very responsive (as other comments have alluded to), but they weren't problematic to the point that I couldn't finish the game.
The respawning at checkpoints was great, and minimized my frustration at getting killed by the controls.
I enjoyed playing, thanks for making it!