A pretty clever concept, I quite enjoyed it! I am not sure if I completed the level but I gave it a fair shot haha. This is a great example of a great proof of concept that can be taken further. My worry is that some of player agency is taken away sometimes because they need to idle quite a bit before getting the dice length they need. Maybe you always get a certain length by default and then mid-air you can reroll for a longer/shorter double jump?
Anyways, great submission!