The idea is very, very interesting ! I'd love to see a fuller/shipped version !
That's kinda funny cause I've remember very well the core idea of using your own corpses as a bridge in the belgian comic named "Kid Paddle" from Midam. I searched the the exact page for a bit but can't manage to find it. I always thought it would be a good idea for a real videogame.
I only wish there was more checkpoints, it's kind of frustrating of starting at the beginning everytime. Especially in a game where the very goal and way to finish it is to actually die.
But there's definitely and idea to explore right here, are you going to continue making it ? Or was it just for the gamejam ? :)