The gameplay has an interesting general premise, though I feel it could have worked better if throw-towards-mouse behaviour was removed altogether in favour of throw-towards-player-direction. As it is, I just ended up placing the mouse in the middle of the cauldron and ignoring it for the rest of the game.
I liked the variety of potions here, although some potions' purpose was unclear (what is "Potion of Supplementary Potions") and I'd sometimes get a repeated one (e.g. "Potion of Feline Vision"). Would be nice if all 25 potions were shuffled, and then if the player manages to get the 26th they complete the game. Also, the potion name could have a brief description below it to explain how it actually benefits the player.
The balancing between the light and darkness was also nice, though I wish the ingredients-spawning appeared a liiittle closer within the ring of light (as in, half-shadow rather than complete shadow?). That, or maybe log-spawning and ingredient spawning would have their own sound effects, so I would know when to add some wood to the fire to search for a fresh ingredient?
It took a while for a new type of enemy to appear; for a moment there I thought that the hands of darkness will be the only enemy I'll encounter. I eventually survived to see the shooting enemies; they feel kind of overpowered, especially the way they start shooting as soon as they spawn, it seems. ^^'
Props for having an option to change controls - I ended up going for arrow keys + Z/X/C setup, so that one hand takes care of movement while the other does interactions. Too bad the settings don't change between games. Having a local record of the best time would also be nice.
Pretty nice game overall, though it could use some tweaking here and there to make it work better.