The game and development seems great so far!
HOWEVER, the only massive problem I have is optimisation.
See, the first two demos with fps and stuff were fine but this latest demo was very laggy for me, even at low everything in the graphics options, i think it's mainly a problem with culling and other optimisation techniques not being there (and the large amounts of logic ran all at once at the same time), this makes the game very frustrating to play on low end devices (I'm on an HP Elitebook 840, if that helps).
If you need help with optimisation, you can look up commonly used optimisation techniques in video games online.
Everything else about the game is decent so far, but if you could fix the optimisation and prevent any memory leaks that would be fantastic!