An absolute beast of a game made in 48 hours. Holy brothers and sisters, this is fantastic. I love the music, the movements, the sound effects, the little 2d monsters. The graphic isn't the best but it fits to the game so much I can't complain.
I still want to point out a few things:
1/ The game is incredibly fun to play, however, it is also punishing and lack depth. Your only tactic is to run around and shoot the monsters, which can be boring quickly. One way to remedy this is to add powers which make the player change their tactic (as long as you stand still, you instakill enemy, etc)
2/ The beginning levels are too long and boring, stressing the point of being long. The game title and picture advertise as being a combat game but in the first 5 or 10 minutes it is all running and jumping, which is extremely bad. I know you want to introduce the mechanic but make it shorter.
2.2/ Give more visual cues to the beginning tutorial on where to go and what to do.
Overall, an fantastical experience, one of the top contender for this year top 3! 8.5/10