The difficulty curve probably rises a bit too fast : you could definitely start with smaller levels, introducing mechanics and their consequences one at a time. This would retain the overall difficulty of the game, but make it accessible to anyone (that's important if you intend to sell it at some point).
Also, there is no feedback on how many moves you have before loosing stars.
This feels pretty polished overall, and this is a nice game.
Keep it up !
Nathan