That was a really nice experience! Great job on your first game jam! The graphics were nice and music was a good vibe. Gameplay was fun and a good take on the theme!
Some feedback:
I think the level design could definitely be more interesting based on things like your starting position. Starting near the top left corner allows the player to skip through a good chunk of the design of many of the levels' dice lower down. I think it's super important to consider stuff like that when designing each level to make sure your placements of platforms and stuff are meaningful each level.
To me some of the levels felt a bit same-y with a similar strategy of reaching the top with high numbered dice near the bottom. I think there's so much potential on how to mix up the levels, and perhaps introduce different challenges slowly through the level design!
Overall I had a lot of fun and I think the game has a lot of potential!