Enjoyment 4/5: I had an alright time with this one; it didn't quite 'wow' me to a 5/5 territory.
Execution 4/5: If I fall into a pit I can't get out of, the game should just kill me there and then. Moving platforms are tricky to get right, unless you're almost impeccable with the timing, it'll always feel a little punishing to wait for them. Boss was pretty well-done for a jam; presented a bit of challenge without being too hard. It's not always communicated which things you can jump up through and which you can't--in particular it's not certain why the trash can is a jump-through platform but not the bouncy squids.
Sensory 4/5: Everything's pretty and serviceable.
Metroidvania 5/5: By jam standards this is pretty extensive!
Theme-relevance 3/5: Didn't really strike me as particularly minimalist on the surface, and judging by your own criteria, this art didn't really vibe as minimalist to me. The mechanics created a *mostly* smooth and enjoyable experience.
Gameplay video below: