The story idea for this is really neat! It took me a few tries and reading the other comments to realize that there was more to the story after killing the golem, though. For some reason the first couple times I played, the player character fell into "dead" mode and nothing happened, so I thought that was the end. And then later, I didn't realize that the "true" ending of the game after the 2nd stage. Perhaps it would help to have little snippets of story narration in between stages/rounds?
All in all, a solid game jam submission; you used the pre-made assets really well!