Wow nice idea you've got there. Brewing potion by combining ingredient that you could not see, that can also change property depends on how you view and manipulate them? Brilliant! This is the sort of unique games that I would like to see in a game jam, and you did that perfectly.
I would say the lack of tutorial does pull the game back a little bit, especially during the start that you just don't know what to do. In these types of game it would always be nice to have the first tutorial level hand-holding the player, just to learn the basics of the game. (As long as the intention was not to force the player find out by themselves that is). Also, the room need to be a bit smaller as bring things a bit closer together. The room felt too empty at the moment and that just doesn't match the "workshop" tone you are going for.
There is also a slight issue that my camera was moving tooooooo slow to the point where I need at least 3 strokes before I can turn and face the bell, which add a bit of frustration to me as a player. I guess some kind of mouse sensibility slider would be nice.
Anyway, good job!