I played through one full round, and here are my thoughts. :)
Firstly congrats on trying something completely new, it's not easy to do.
Have you tested this game on a table IRL? Might be a quick way to refine the rules and practice how to convey them to players. For instance I didn't realise until the end each player was trying to flip tiles to their colour(?) - perhaps I could have guessed but I didn't see it stated anywhere. I also didn't know there was a setup and then play phase. All things which can be easily fixed and communicated to the player I think.
Well done on submitting another GWJ!