Simple mechanics, definitely could be expanded into a popular mobile game. I think the only thing was the lack of a tutorial/controls page, but other than, really good job and great execution. Also, I think that removing the icons from the blocks could have helped too, since they were either stretched or didn't look right. I think solid colors could really help the game. All in all though, great game, I found myself continuing to play longer than I should have, haha.