The small/big thing was pretty excellent. There is a lot of exploration potential here just with the possibility space from the few powerups that got implemented. You could easily make this a fuller game for SMVM if you were so inclined.
The bad:
* Controls and screen transitions while moving are awkward; in particular, held inputs don't seem to transfer, and I at least *can* do a weird air-jump if I'm gliding?
* Enemies in later areas had a bit much in the way of health. It sometimes seemed like they would get knocked back in an unintuitive direction.
The good: pretty much everything else tbh
[Edit: Reaction video below:]