About:
2 players are playing 2D-shooters: you on the left and the computer opponent on the right. You can't interact directly with your opponent, but you use cards to spawn enemies, hazards, and other effects on its side. The object of the game is to make your opponent lose all its health!
At first, the computer AI is not smart at all, but it gets harder as you progress.
How to Play
Move around using the arrow keys or WASD. Press/hold spacebar to fire, and press shift to boost. Use cards by pressing the 1, 2, or 3 keys for cards in those positions, respectively. You need enough coins in order to use a card first (get coins from killing enemies).
You can change the key setups in the options screen.