Hotkey Reference

General

B - build menu (same as clicking command center button or pressing enter)
ESC - return to build menu. This is your panic button!

Colonists Menu

T ent
C ottage
S tone house

Resources Menu

H unter
F isherman
W ood
Q uarry
f A rm
oil platform (e X on-mobile, the oil company)

Electricity Menu

T esla tower
(W ind)mill

Industry Menu

W arehouse
woo D workshop
S tone workshop
F oundry
M arket
B ank

Military Menu

B arracks (solider's center)
G reat ballista
lookout ( T elescope) tower
R adar tower
E ngineering center
S hock tower
e X ecutor

Defense Menu

Too much repetition, I went with a grid layout instead

Q - wooden wall
W - wooden tower
E - wooden gate
A - stone wall
S - stone tower
D - stone gate
F - wood spikes
V - barbed wire