I thoroughly enjoyed the game, so thanks for making it! It definitely reminded me of Shadowgate, one of my all-time favourite games.
The only part in the game I found frustrating was adding the chemicals to the water supply--it'd be helpful if it was more descriptive rather than simply beeping when the chemical combination wasn't correct.
There appeared to be a bug involving the space suit and boots and the outer door; I was able to safely open the door without having them in my inventory after loading a previous save where I hadn't yet collected them. By the way, you'd get blown out into space--not sucked.Anyway, fantastic work! Thanks so much.