Most importantly, I had fun and played for some time until I gave up on making the poison. Was a bit frustrated by all the items that could not go into the pot but are obvious ingredients. It would have been more encouraging to have them go in and fail. Otherwise, this is flawless.
Well, I couldn't resist and went back with a piece of paper and produced all the permutations of the 5 objects I was able to put into the pot. Then I clicked on everythihg trying to see if I'd missed an ingredient. Alas, I failed and everything went wrong and I'll be stuck in the tower forever.