Neat idea and fun to play
However I feel that minimal chess might be an easily solvable game even with the randomized starting positions, it could be that good players might grasp it quite fast and this can lead to very boring games that always end up in draws, just a hypothesis and my intuition but thid could be an issue
Found a gamebreaking bug: when moving a piece you can quickly double click another of your pieces teleporting that later piece into the square the original piece was moving into, effectively breaking the game being able to do illegal moves, I was playing on a mobile.