I like being huge.
The game is 95% idea (which is genius, I would play a game like this), 5% implementation.
There's no animations, the visuals are messy, game screen isn't fitting on my screen (on chrome. Had to scale down the tab, maybe it's working on standalone). The controls were driving me crazy and I've had a hard time going through the basic obstacles or doing basic jumps. Then eventually I got stuck after drinking a potion that made me very tall and breaking the ceiling with my head. The potions placement seems kinda unintentional and aswell.
I feel like a real hater right now, but it's to help you improve on the concept that has THIS much potential. I took a look at the source code and it's all in one big 2000 line file - it must have been a mess trying to make the game polished, when the code itself needs polish.
Have I mentioned the concept is great?
Well, it's really really great.