Lovely game, the art is awesome, I do enjoy a little incremental game every now and then. Very good for a gamejam.
I think the characters and other art is very cute , though the game loop gets quite boring after acquiring most of the upgrades.
I managed to get all the perma upgrades by day 2 and it took until just the beginning of day 4 to win, with constant toggling of the two non perm upgrades. I also gave up with the random cards as losing 500% production or no production felt way worse than 2x or 3x production, as I wanted to finish as quick as possible.
I think adding more of a game to the card mechanic will definitely make the game less boring after a while, however I think this is a very good foundation and could be expanded upon easily. Good job!