I'm thinking about creating more random terrain that may hang around for limited time, like a sort of temporary arena set up that comes and goes, in different shapes and sizes, adding to it enemy swarm formations that can generate within that.
This is my first attempt at random generation and what I am doing is very primitive, but I think unity is going to be a great help making more advanced formations.
Yes, it is all SFXR sounds
I also really like the idea of discovering new things a lot in games so this would be awesome too. The possibility of always finding something new is fantastic. Thanks for the tips. Now I just need more time to actually get some of these ideas in the game.