Bah, I don't get paid enough for this...
Very fun, I'm actually a fan of leaving items somewhere to return to them later, and needing them to enter specific rooms. You almost got me leaving the key card to enter the lab when picking up the oil can, but I remembered! I just wish that kind of idea was used more, but I won't hold that against you since, yknow, game jam, these are really just proofs of concept.
The style of the game was something I also enjoyed, and giving the player starting items is both a clever way to teach the player that picking up an item drops another, and a cheeky way to save on time when developing an inventory system (I've made many of my own, don't think I wouldn't catch that)!