All upgrades add gold.
Tower defense in dark fantasy world with amazing graphics and non-standard dynamic gameplay.
1, 2, 3, 4, 5, 6, 7 - set appropriate tower.
Up, W, mouse wheel - scroll map up.
Down, S, mouse wheel - scroll map down.
Q - convert tower.
E - update tower.
A - cancel sell/convert/update/build tower.
D - sell tower.