the concept is very appealing! i don't play a lot of chess, but i'd play this. for me, it makes chess more interesting and less intimidating - much like the way Balatro makes poker more fun and accessible.
after some trial & error, i figured out most of the mechanics, but as you mentioned, a more comprehensive tutorial would be helpful. it also feels a little too easy to reach the target right now, but i'm assuming the difficulty ramps up the way it does in Balatro.
i am super impressed by the concept, the look, the sound and the overall feel of the game, and I think it has great potential. nicely done!