This was a really cool autobattler! Overall I really liked the card art, the music was catchy and non-intrusive, and the builds you could do were interesting.
I lost my first game because I mixed fungus with spiders, and the AI eventually just had a humongous fungus (heh) and I couldn't win.
2nd round I did a spider build and it felt satisfying to win with it!
Some issues though - - The egg unit would not spawn low level spiders upon death. I wasn't sure if it was because I had a full board or not, so I went into a round with an open slot and it still didn't trigger. (I just now read that multiplication ability does not trigger in your changelog, so ignore this part!)
- Once the boards got large, the fights took quite a long time.
- I'm not sure it fits the theme entirely, I could justify unstable as in the shop itself was unstable but I never felt like the instability of the shop affected me much.
- Upon running the game for the first time, the music was ear-bleedingly distorted for some reason. It fixed itself after a few moments but something to think about I guess
Other than that, as an experience and as a fan of autochess games, I think this is a really cool submission and I'd be willing to play a full version of this if you chose to take it further.
Nice work!