A good start!

The control is clunky and the goal of this game is still undefined. How am I suppose to get those postions up there?

Neat little game. I like the potion inventory system, and think with a few more potion types it could make some really interesting puzzles. Right now, your puzzles mainly just used the reverse-gravity potion, but it would be interesting with potions that freeze, break walls, etc.

The character movement was a bit slow and floaty. I'd recommend doing some research on platformer physics, because there's a surprising amount that goes into making it "feel" like Mario, Celeste, etc.

Nice work for 72 hours!