This was fun as hell, the character models and the level look really cute, it's also pretty challenging, most of the enemies moves toward you and it's pretty complicated to jump over them sometimes (mostly that flying robot thing) the boss wasn't easy either.
The only bug that I found was that I died on the second level on the lava and restarted with -2 lives, dying again would give me -4 and then -7, I didn't really understand what was going on.