with demo update .30 it adds a ton of features the list is as follows
-added 7 new enemies to the game.
-added new absorbtion zone where you just have to be in the zone for so long and you get money and experience
-added the start of the demo end game content with different enemies higher tier acheivements etc.
-fixed the save system completely, it was completely redone from the ground up
-swapped out some ugly art work to get it to match the game better.
-added enemies to delete when far enough off screen (performance)
-added planet diablo which is a very important buff for late demo gameplay.
-made the new enemies work with existing systems properly. this was a major task.
next update you might see the beginning of the next black hole evolution.