Thank you for helpful feedback! I'm glad you like it :)
You're absolutely right about the turner-things. I was thinking about it during development. Those turner-things make sense only with pawns and I originally intended to give pawn more space.. There should be more puzzles and more mechanics (at least changing position by capturing another pawn). But I found the knight's part more interesting, so because of limited time I decided to show pawn only shortly and give more space to the knight... Too much ideas for game jam :)
I agree that showing allowed moves would be helpful. If I make an extended version some day I would definitely have it in mind.