Nice! One of my favorites today!
I really like the sprites used for the little guy and the skeletons!
Having more rare colors for the bones also worked well, but I found myself stalling until I could find a specific part I still needed, causing a lot of the while bones to build up over time
I had a lot of fun trying to get the different parts and evading the enemy, but after the first few skeletons, I found myself using the same strategies (using a chest to block the enemy while I opened it) to make progress. I think it could be interesting to introduce several, lower health enemies to up the difficulty and to introduce more 'wins' throughout one game.
Overall though, I think this is a solid concept and I saw lots of interesting dynamics come up naturally during play (like having a moment of reprieve when the skeleton is fighting to sort of sort through everything.)
Great job!!