The level design is great! The puzzles really made me think, and I also love the artstyle of this game!
There were a couple of bugs I found though, when you return to the tile with the purple rock again, after you have already collected it, it plays the sfx and the particles for it again. Second was when the player goes into a gate tile that is open, but the next turn it closes (because the other player stepped off the switch), the player gets on the gate tile and the gate itself is visible, the player can move to any other tile without a problem afer this though, I would suggest checking if the gate tile shares its tile with the player, if yes then don't close the gate until the player gets off the gate tile.
Overall an amazing entry!