To play, first select if there will be an ai (computer controlled player) or a real player for each side (ai vs player, ai vs ai, player vs player...) For each player-controlled side, there are keys shown that can be pressed to create a certain unit shown above the key along with its price. For what each unit does, see the notes and credits. Every unit costs mana, which is generated every second. Your income can be upgraded with another key (shown in game). The object is to reduce your opponent's health to zero.