I love me a good roguelike deckbuilding game! This one was really in depth and I like how there was three different resources you can use, which each had their own identities.
The clicking order (enemy then card) was a bit hard to get used to, but as I played the game more I understood why you did it. This is something that can be explained if you add a tutorial. Some sounds and more feedback for why your actions aren't going through would help with the admittedly rocky start I had with the game.
The balance might need a tiiiiiny bit of work though.
Example 1: Infinite fast energy / damage on turn 1 ( I wanted to see what happened when I got to 100 energy lmao)
Example 2: Infinite damage on turn 1
Overall I had a lot of fun breaking this game in half, it was really polished and had a lot of depth. Good game!