I think this game is really cool, but it's held back by some UI design choices that are going to make it difficult for some people to play it long enough to let the nuances of the battle system shine through properly. I did really enjoy the gameplay, but I ultimately wasn't able to play it for very long because looking at the menu against the backdrop of the game for a while was straining my eyes.
Here are some of the things I took note of while I was playing:
-The first shop I entered didn't let me buy anything. It just gave me the option to exit, it was a bit confusing.
-I really think the colors of the UI elements don't really mesh well with the art of the game, at least in the battles I've played. I think a dark background with a lighter outline would work, maybe using a set of colors that match the battle background, or something neutral white/black/gray. I'm playing on PC, and I ultimately had to stop playing because the huge buttons with bright colors just made it too difficult to look at the screen for long enough for me to reach the final battle.
-I think the card descriptions should disappear when the player isn't highlighting over the card, or the description box should be semi transparent. It's a big part of the game window and it's drawing my focus away from the art, which is nice pixel art. The description box also overlaps one of the enemy character's hearts in battles against multiple enemies.
-I don't think the game title logo needs to be in the center of the screen in every battle, it's a bit distracting during the battle. Maybe with removing the game logo from the battle screen, the card description box could be taller and slightly thinner, allowing for more of the cards to show their full descriptions across screen sizes.
-I like the card battle system and I'd be really interested to see this game with more card variety to allow for more strategic or thematic playthroughs. I did however ultimately default to using the "4 damage to all" and the "+10 to defense" on pretty much every turn. It felt like those cards were pretty common, and that combination seems a bit overpowered compared to most other things I saw while I was playing.
-I think adding some big animation when the player does an attack would be really cool and go a long way. Maybe even different animations based on the kind of attack/buff that was just played.
Overall, I enjoyed my time playing it and I'd be really interested in playing it again if the UI issue could be resolved!