nice entry, GG. play was great along with the ambience & polish. cloud cover was a nice touch :) 2 suggestions if you continue development: 1) somehow indicate whether a platform is buildable/already has 2 turrets (and disallow the Slider if we can't build) & 2) indicate Successful Defense/Win vs Game Over/Loss. I panicked when i couldn't see how i lost (when i didn't :) ). otherwise, good stuff!