Hidden Shortcuts (game is trackball friendly!)

[InvisGhost]

My friend was having trouble playing the game since he uses a trackball instead of a normal mouse like a sane person.

Anyways we figured out some controls that aren't exactly advertised:

Rotate Camera: Alt + Arrow keys
Zoom in and out: Page Up and Page Down
Rotate Buildings: < and >
Cycle Between Building Variation (ex: Different style farms): []

[Kunovega]

I don't remember if cycle variation is mentioned (it's been those keys for a couple of games now), but the rest is taught to you during the tutorial, not really hidden.