I had fun. I enjoyed the different powerups, and liked that there wasn't really an extra to using them once I'd unlocked them. It was sort of frustrating trying to get into the 1x1 paths, although I'm not sure if that's my own shittiness, or something to change. Maybe a slightly smaller hitbox on the player? Also, 8-way "look" would be cool for fighting enemies, I often found them diagonal to me, but running diagonal is twice as fast and feels DANGEROUS.
Also, was it intentional to have the tempo of the regular drill line up with the music? If so, nicely done. If not, nicely done!