top down? like birds eye? not very platformer...
Best I have is a birds eye game where jumping raises your level, blocks set to levels can be walked on and under... however I cant share the cap.x yet sorry. soon
alternatively if you mean a top down, to be like go in the top and go down to the bottom...
platforms that move, then move in the other direction upon collision. only limitation to how much it changes without becoming a mess is up to your creativity, maybe some destroy blocks so the player has say in how the platforms move?
or do you mean a random spawned dungeon...if that, post it when complete lol