I only really have one complaint, and that's the portal region. It feels pretty slow.
The only thing I would like is if the orbs would flow into a currency counter in this area, just so it feels a little more satisfying to collect them. This would probably also make it feel a little less slow.
Other than that, the game is all around well done - especially for a first demo. I hope you don't experience any more delays in production, take breaks as needed!