This is fantastic! The open ended puzzle design felt great. Strangely, I found myself not actually using the scaling mechanic all that much, but the different blocks all felt cool and useful in different ways. The limited ammo felt frustrating, as I kept waiting around at checkpoints for it to re spawn; maybe if the checkpoints filled you up to a certain level but deleted all placed cubes then it could reduce the waiting around. Very fun mechanic, and great aesthetic. Well done!