I think it is a fantastic base idea that with iteration could make a great game. The use of your tombstones to solve challenges was great, and I wish we had seen it more and used in more inventive ways. The respawn room to get items was great, but I think a bit too easy. Some less clarity on your end I think would increase the efficacy of that idea. Finally, the platforming/action puzzles were a nice change of pace sometimes, but I think the puzzles is where the strength of the game was. Great work! I hope you expand upon it.