I really enjoyed the gameplay, it already feels quite well balanced from the few runs I played. The soundtrack fits the style of the game perfectly, and the overall presentation is very polished. I also loved the small details, like the text changing when you create special structures, it helps break the monotony in a nice way.
Adding a few subtle animations to the tiles could make them feel more alive. I also wasn’t able to create some of the special tiles and the key to get spoiler doesn’t seem to work on my French keyboard.
I appreciated the in-game explanations, but a more progressive tutorial as mention in another comment, introducing tiles step by step, could make it even better.
Nice game :)
