Hey! Thank you very much for the kind words, very much appreciated.
About the theme: The game at first was going to be a level based puzzle game, where you had to finish each level with only one piece of each different symbol, but I level design wasn't very fruitful, and I feared doing a level selection menu + level transitions... So through iterations the game shifted to this, that it I know it doesn't really embrace the theme like other entries, but was key in my process to make a compelling gameplay: You need to break groups with only one symbol of each type inside to turn them green.
Again, thank you very much for playing. I'm going to try yours game now.