Lower dice rolls could be remapped to alternate abilities, such as a mid-air dash or ground pound. As the game is currently, rolls of 1 or 2 are useless, wasting time. Replacing 1 / 2 rolls with a move that actually helps the player would make the experience less frustrating. I think that change could make this game much more enjoyable.
Sound effects, reducing the time it takes between jump attempts, and automating the dice rolls would make this game cool to play through. Playing the game with a macro spamming 'R' to recharge the dice has doubled the appeal of the game.
There's also a bug where pressing the character against the wall in anticipation for a jump will cause the wall to 'eat' the jump. The player must jump and then move.
Nice job with what you have. I'd like to see a version with such tweaks in the future.