Well done, I love cozy tile games like this and I really liked the art style. Are you supposed to be able to get to a point where you can't place your last tiles because there are no valid spots? I hit that and realized I lost at that point.
It is quite easy to get to a situation where it is impossible to place some shape. There is a "SKIP" button in the lower left corner. It will skip the current shape and you can continue with the game.