Use your energy to play the cards.When have no energy, click the end turn button. Move the mouse to your cards and the boss to view their informations. "Exhaust"means they will be removed from the cards after used.
I found a random sts project from 8 years ago and decided to rework it. I think my rework is about as hard as an act 1 boss or an act 2 or 3 elite. The og is like an act 3 boss. Also the og had a randomized pattern so I made it one