love it <3 thank you for writing it down,
sound effects - coming soon
community addons + addons API - we already built it, but it is not released
different colored tiles for tetris - will fix
object-oriented backgrounds (to make the next item possible) - good point, the backgrounds are unity 3d scenes, so we can add a lot in their
interactive backgrounds (eg. clicking on a leaf would make it fall) - nice idea, I think a lot of people will love it