I haven't played many autobattles, but I did enjoy my time with this one.
The base game of "reflectors and attackers" was easy to pick up, but most of the cards had some sort of tradeoff, which kept deck-building interesting. I also appreciate how you could still buy cards after losing (instead of it just being "game over"). One bit of feedback I do have is that the font was hard to read. If you switched to a non-pixelated font, I think that would still fit with your art while still improving readability.
Anyhow, I'd definitely follow the game if you kept working on it!