Really good game. 5 stars for me.
I like the graphics/palette.
Music is fantastic.
SFX so good.
Thinks to improve IMO:
Gameplay really hard even if that is what it make addictive (maybe review the hardness).
The camera shake it is little frustrating, if you play too much it really disturb you.
I'd love to see a "post-mortem"/ "making of " of this.