Build Tower: T
Build Trap: R
Build Amplifier: A
Build Lightning Shrine: L
Build Charged Bolts Shrine: C
Build Wall: W

Combine Gems: G
Throw Gem Bomb: B
Extend Mana Pool: M
Freeze/Unfreeze Time: Q
Send Next Wave Instantly: N
Refund Mana from Gem: X
Duplicate Gem: D
Enable/Disable Info Panels: I
Create Gem: 1,2,3,4,6,7,8,9
Go to the Options Screen: P or Esc

Havoc and corruption swarms through the land, and you are one of those few wizards who can put an end to it. Create and combine magic gems, put them into your towers and banish the monsters back to hell!