I downloaded this program today after seeing it on the Gamescom show and decided to check it out.
It crashed 10 times and doesn't run properly on my computer but it does run, somehow. It blows my mind how this is running at all on my computer, didn't expect that. The graphics look like PS1 but it's very smooth (when it's not lagging or crashing)
I think this has a lot of potential. I could see this being popular for people in poor countries with shitty computers but doesn't seem like a Unity3D killer.
Also they seem to be partnered with Epic.