My feedback: I like how the game adopts the Game Jam's themes of "one enemy" and "blocks". The music fits with the overall look and feel of the game also. The gameplay itself however, could use some refining or tuning - it seems to me that the enemy starts with an excessive amount of endurance points, which causes the game to be drawn out longer than it should be. Maybe another idea could be to do a level system where the one enemy has little endurance initially, but then gets more endurance on later levels along with weapon upgrades? But, in any case a good effort and a complete game, unlike my project which I failed to complete before the Jam's submission deadline!