I think many people can agree that upgrades for the special cells should be added, mostly the auto placement of them would really help as this is an idle game after all, like this comment if u agree it would help the developer see it!
I do not know if u are still working on this game, working on the squeal, or have just flat out dropped it but i would recommend adding in a function where other players can trade cards with each other.
I Take back what i said because I realize i'm an idiot and there was one i just skipped it XD. i would also like to note that the story in this game is absolutely extrordinary
The game could very much use an IN GAME tutorial because i found it to be very confusing and eventually figured it out just by testing different things.