Press G to add money, H to add lives, J to toggle unit health, K to toggle hero spells cooldown, L to add magic, U to add goblin market money, I to add hero skill points. Link gives more crystals.
Dark forces come again. The kingdom calls upon you to fight against this forces. Our lands needs a hero! Lead your brave squad at the battlefield and save the realm.
F1/Q, F2/W - heroes selection
1, 2, 3 - magic, when hero is selected
Enter - Start the wave earlier
Space - Speed up/down
Esc - Cancel selection
P - pause
See in-game hints and guide for more info!