I like the general idea! It's a fun concept that you play as a silly little guy who can *also* control time.
I think a small improvement would be to increase the "drop box" for where the ingredient can be added to the potion, like extending it upward a little so you don't have to drop the ingredient on the lip of the cauldron, but can also drag it to the space just above it a bit more. Hope that makes sense.