I like the look of the game, and the way the cubes roll around is satisfying. As others have said, I struggled to understand the goal initially, and I didn't quite grasp what the description was saying about making a match. I think you could take a tiny little screenshot of a stack of 3 matching cubes and put that in your page description (you're allowed to edit your page as much as you want during the jam) or put it in your screenshots with some explainer text.
In any case, good work!