Wow, I really like the music composition for this game, gives a melancholic vibe. The art for all the enemies was pretty good, but I don't think the playable character really fit with the rest of the artstyle and the world.
I would also rework the walking animation. A walking animation is something you are forced to look at the entire playthrough, so having a neat and cool-looking animation is a big win.
I like the design of the "tileset" of the world, but I think it would have been nicer with square edges, giving it a more solid and cold look. curves on enemies in fine since it gives them an organic and squichy feel, but for the floor I would want it to look hard and cold.
There was some nice platforming sections sprinkled within, which I think you should lean on more.
I am not sure how to finish the game. The boss gives you a new dice, but the text is blocked by the roof and you can't fully read it. The dice merchant guy (or whoever) also has a bug with his dialogue stacking, making it unreadable when you go back to him with the double jump.
I did enjoy the game a lot, congrats on submitting!