Give some ideas for gimmick rounds

[Lavastage]

TETRIS! THE STATION IS SLOWLY BEING FILLED WALLS OF DIFFRENT SHAPES AND SIZES! TRY NOT TO GET GIBBED! REMEMBER! DYING IS .:Fun!:.

That reminds me, I once had a little gimmick idea where asteroids would start coming in from all angles, but they were all tetris blocks, destroying walls until the asteroid itself is destroyed, leaving behind a cluster of walls that the meteor resembled. though this will take a chunk of coding I think this would be pretty fun.