Yeah, checkpoints are just one of those things missing simply because there was no time left in the jam. And you're right, the change of jump-height somehow got lost along the way.. However... I will change pretty much everything with the next update, as the game right now is far away from what I intended. I tried new ways of doing things, but not everything turned out how I expected. I would've never published the game in this state if it wasn't for the jam.. ^^' But anyways, thanks for your feedback~