Thanks Ayyyspoon!
Yeah I have always loved couch co-op games and thought I would take the opportunity to implement it here.
I was just thinking of adding a defensive mechanism to the game, so once one player has selected their tiles the other player can select 5 tiles with the right mouse button which will generate defensive points to deflect the oncoming attack.
One of the ideas I also had originally was to have each tile display a number on top of them at the start of every round for a very short time. The player then has to try to remember where they saw the highest numbers and select those to generate the power score. It then becomes a bit of a memory game.
What do you think?