Joined together with the enemy: so far so common.
The enemy is periodically shooting at me: huh not bad.
I need to use the enemy's shots to solve puzzles: now you have my attention!
The charge up sound is very good indicator to work with, while I would have liked for the enemy to lock in its shooting direction earlier, maybe with an indicator for it.
The visual presentation is obviously amazing! Beautiful pixel art and shaders. I nearly was at a... loss... for words there. ;)