Nice job! I enjoyed hunting for keys and discovering all the secrets. When the water killed me I wasn't sure if it had or not because there wasn't any visual or audio feedback, just a respawn, but that's understandable given the time constraints. I ended up walking back and forth multiple times every time I needed a new key. It would be nice if each key granted access to areas that contained more items, such as the gems, but it was a fairly meaty investigation zone and I thoroughly enjoyed my adventure.