this seems like the kind of game that requires a lot of time to properly judge, so I'll only give some first impressions
I like the concept of being able to make your own cards, but the process of doing so is pretty clunky. it wasn't immediately clear to me where the 'fast forward' button will go: does it skip from e.g. active effect 1 to passive effect 1 or somewhere else? sometimes it seems to do nothing
something I'll suggest is having the components of cards be loot pieces that you can get throughout a run. you might find a 'Draw two cards' component or a '5 HP' or something like that. selecting things from full lists doesn't feel too good
UX in general is a bit poopy I'd say. progressing or skipping through all the various phases in-game gets tedious. sometimes I accidentally skip past the attack phase and so fail to hit anything
art's pretty good. no idea how possible this is but this would be a great game to embed one of those image-generating AIs into. so you can type a prompt to get a card image matching whatever stats and name you put on it