Interesting spin on a card game, overall it is a nice idea! Few things I’d have liked better as a card game player:
Not sure if just missed, but it would be nice to see the effect of the opponents card. It would be nice to see my own seeds face side up. Delay on card activation till effect happening seems a bit too much.
Sadly I did crash after watering an Aspargus? (1,4 green plant). It applied the effect, but before my attack phase happened it black screened.
Msx and sfx is way too loud on base level, please double check that before publishing. Art is cute, has a nice charm to it. Def. will keep an eye on this, always interested in more card games, nice entry!