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.

Nice little game! I liked the style.

It would be nice, if there were more dangerous things, that can kill you.

I liked the ending and the overall presentation.

Its strange only thing kill you is the water. Is interesting puzzle but  need some direction and hints what you need to do. Its frustrating when you open one gate and nothing there. I feel the next key need to be in the new room you discover or something give you direction in what area the keys are. Spend all this time and the ending is disappointing Just BLOW the pyramid  :D. I like the game you need to expand this have potential! And made some lights in the tunnels its dark there. 

This was great! Loved the pixel shader and the dust particles