I really like this game.
Much better played on the PC build as u said.
I would have loved to have some UI to tell me which of my pieces had multiple movements since I kept forgetting or misclassifying them.
also maybe as a difficulty setting maybe add a toggle that tells you where enemy pieces can move for a while so that those who don't play chess or maybe those who aren't familiar with the movement scheme find it easier to start with the game.
I think this has the potential to be really good given some extra time.
All in all, really nice and I love the art.
Good job!