Thanks a lot ArtsyDoopsy. Nice idea about the ghosts. Please report back on your experience with Necrodancer. I haven’t played it but I did try Cadence of Hyrule and couldn’t get the hang of it at all.
I agree that the difficulty of a level often depends too much on where the bones generate. I have tentative plans to extend this game into something more fleshed out, with designed levels rather than the random generation here.