Nice sokoban with a good twist. Loved the state transformation mechanics that give the whole game a unique identity, and it was nicely utilised throughout the game as well.
My small nitpick was that the sprite for the liquid (?) form is a bit not obvious, I originally thought it was actually the solid form for the first few levels. Also, it would be nice for any turn-based puzzle games to have an undo button (this is not a must though)
Anyway, nice job!!