This game was actually very fun! It's hectic, constantly trying to get the rest of the cube into position so you can twist in a healing item, or at least a weaker enemy.
As for feedback: As with a lot of other entries, I'm missing some SFX, and a way to restart the game after getting a game over (twist or double tap to continue). In addition, I can see a future version starting out with weaker enemies and building up to stronger enemies, creating a bit of a difficulty curve and a larger variety of enemies, etc. But this version was definitely also already fun as-is :) Good job!