I liked it a lot.Similiar style to Shape n bits :D
But addition of checkpoints will be better.Just make option before starting a game - with checkpoints or not.Will be cool idea to add different shapes(cages?) to play on.And maybe add more abilities for buddy to interact.Like sometimes he can do stuff on his own,like shooting or give you health if you close to death(shield for block 1 enemy?)
Good job!One of the best and polished games i played for now.