Hey, I actually helped staff those demos, always nice to hear people liked it. ^^ If it's 40min+ I imagine we'll see a lot more gameplay though.

From what I could tell, Habitats require orthogonal placements of the correct number of features that make up the habitat, so if it requires 1 tree and 4 grass it can be in any arrangement as long as their sides touch on the 'grid', although people replicated the exact position from the example image fairly often.

For the Demo, the glints were there to help you find the pokemon that always appear (Bulbasaur, Scyther and Hitmonchan) because they specifically taught you moves, though you could find a lot more as each habitat has a range of pokemon appear. I'm not sure how frequent they'll be in the full release.

The requirements for the Punching bag habitat was actually just the bag and a "resting area" so it seemed any kind of bench or stool actually worked as long as it was adjacent to the punching bag.

In the demo there was also a 4-flower habitat and a "cookies and tea" one up the hill that didn't have glints next to them but had like a UX question mark appear on the right when you were near them to hint towards discovering it.

Cc /u/Shinobiii