The mechanic of absorbtion is really cool and the feel of the game loop is very rewarding. The game is very much fun. The SFX is really cool and adds to the mood.
Unfortunately there is no background music and no indicator of how many mobs are going to come or how many waves you have to survive. Also, I dont really feel like the "boss" in this game, even though I am clearly superior to the mobs.
Overall a phenomanal fun game with a very polished and beautiful aestetic!