How about some keyboard shortcuts? I use them all the time, but many people who play don't know about them.
I'm thinking they may account for discoveries.
- < > to rotate camera
- Page Up and Page Down to move quickly between levels
- Home and End to quickly cycle walls up and down
- Z and X to zoom in and out
- `, 1, 2, and 3 to adjust speed and to pause the game
- Esc to quickly exit out of a menu
- T to view straight downward when building
- F1, F2, F3, F4, F5, all control switching between play, buy, build, story mode, and Options