Congrats on finishing your game!
Your premise is straightforward and solid. That's a good goal to have for any game jam. It's easy to understand, clear what you need to implement - good foundation. And your presentation, while a bit bland, is very readable and there's no confusion about what the player should do. That's a good thing!
Unfortunately, it just comes off as a little boring. Each subsequent level doesn't really do anything other than test your ability to "find" the red pip. And even that can be a little tedious to check each face to find it. The blue teleports felt like a step towards something a little more engaging, but teleports are just different ways to change sides. I'm not saying you should have scoped more content - it was 48 hours. But let yourself explore the design space a bit more. If you are walking around on faces of a cube, what else can you do with that? Can you use perspective to have pushable blocks that appear as paths or walls after you turn the die? Could you have moving traps or enemies to add a little more pressure or risk to your movement? Explore the space a little more and do lots of playtesting to try to find the fun in your premise.
You've got a good foundation in this game. Keep making games and practice those design skills!