Ah, this is indicating that the demo is not playing as intended! I will need to check it out, probably make an update and get back to you!
I just replayed the demo and it doesn't force end. I played through to the end. The 'buy it on Steam' message you get when you sleep isn't an end, you can just click through it.
Ah, my bad.
How many stages of growth are in the full version?
Three overall. Each one unlocks a new location for the game.
