Awesome man, that's great you're carrying it on. I'd defo be up for the sprites, in fact I've started on a few already :D I'll get in touch on Discord and send you the ideas and see what you think. Tbh they are pure 80s/early90s GB style, but at first I'm using the Master System palette just cos it's simple and I love it. All that can be changed. Also, you may think they aren't that great. and that's fine, no pressure to use anything I make at all :) I've gone ahead and started doing a few buildings as well haha.
That's awesome you've already started to work on that other stuff, it is gonna be such a cool little game!
Tbh sometimes AI really nails it haha, a lot of time it's janky as shit and all that, but those cards are really quite cool. You could use them as a template for a paid artist if you get any budget behind the game, but really for what you are doing now, they seem to be so perfect it'd be kind of a shame not to use them :D
Excellent work man, like I say I'll get in touch on Discord and see what you think about any sprites I've made ;)