It’s a really cool game and concept, but the keyboard makes it kind of miserable. I haven’t tried with a controller yet. That said, I don’t think think you should subtract the score from the player when they die, for two reasons: A) In many cases, the death is punishment enough, as it is very challenging to get from one checkpoint to another in a few places. B) It discourages collecting all of the gems, since many of them are going to cause numerous deaths along the way, often resulting in a net loss of points for collecting the gem.