I've been trying out for a bit and I'm surprisingly really enjoying it so far. The adventure game caught me by surprise, i honestly didn't think it would be that good at all. It is decent fun the way you can create things on the fly. I get some frame drops in combat though, but I guess this will improve over time with some optimizations. The game seems to be a tad dark for me and I can't seem to find the option to adjust brightness, so hopefully they add that in (assuming it's not hidden somewhere I couldn't find it).
The create a world mode is fantastic. The tutorial was quick, concise and easy to follow. The way you can program the way things act is really cool yet simple. I'm really looking forward to experimenting with it and seeing what crazy things I can come up with. Not to mention the nice array of customizing and props available to use.
Only real issue I've found is enemy AI sometimes get stuck in/on objects and terrain. I'm really looking forward to seeing what the final product will look like. This game has got a ton of potential.