Cute art and really cool gameplay! I love how you used the die for multiple mechanics (i.e. as a platform, as a weight on buttons, but also as the whole other rolling mechanic for the second component of the game). The two screens with different mechanisms worked really well! (Also, I can't help but note how much this feels like a game made for the DS or the Wii, with an actual good purpose for a multi-screen device.)
I'll note that I think the die was too easy to roll -- I could basically just tap right and then it would tip over without moving very far at all, which, in my opinion, limited the multi-screen gameplay into a "do one, then do the other" affair. If you need to be more careful about where you have space to roll it far enough, there might be more things you can do in terms of level design.
Overall, a really good game: fun to play, nice to look at, and a clever design. Well done!(Is it just me, or does this game essentially also fit like two of the previous GMTK Jams' themes? Specifically Joined Together [for the die in one screen being attached to the die in the other] and Dual-purpose Design [for the multiple uses of the die]?)