Use the following commands after enabling the Game.toggleDebugMode code.

Effect	Command
Decrease highlighted unit's strength by 0.2	[Shift] + [
Display debug menu	[Ctrl] + D
Insert unit/city	[Ctrl] + [Shift] + Left Mouse Button
Increase gold by 1000	[Ctrl] + 4
Increase highlighted city's culture by 10	[Ctrl] + [Plus]
Increase highlighted city's population by 1	[Shift] + [Plus]
Increase highlighted unit's strength by 0.2	[Shift] + ]
Instant production completion for highlighted city	[Plus]
Level up highlighted unit	[Ctrl] + [Plus]
World editor	[Ctrl] + W