I like this game a lot! It's so well balanced - I was successful, but only by inches - a real thrill at the mountain!
Some feedback:
- When a Card finds no target, I wouldn't resolve it, but rather bring it back to the hand. Sometimes it is really not that abvious that a Card needs a target (there was this one expensive card in particular, a wind blow or something? I wasted lots of energy with this one, just because I made the same mistake many times)
- The "+1 Energy" card wasn't intuitive for me. I thought I just have to click it, or drag it out of the stack - it took me several attempts to understand that it has to be dragged to certain places.
- Usually I would recommend speeding up all card animations/transitions at least by 2x. But during the game play, the slow movement created a nice, calming vibe.
- The SoundFX are barely audible
I think that's it for my minor quality-of-life improvements.
All in all you did a fantastic job!