Not sure if I was missing something, but I thought the levels were way too challenging and punishing. And that's coming from someone who plays challenging platformers like Super Mario World kaizo and IWBTG for fun lol I think the controls were good (although I noticed you could slow fall by mashing jump which seemed unintended).
Also I think the dice mechanic could be improved. Perhaps if the dice were "checkpoints" in addition to modifying your life count it would be more interesting, so you're potentially taking a gamble to either continue on with the lives you still have, or grab the dice checkpoint and take the chance on how many lives you'll have to finish from there. Just an idea! :)
All that aside, great job on this! Loved the art/music and I think this game could be amazing with just a few simple tweaks to the dice mechanic and level design.