BGM logic

Currently music instantly triggers the switch when you summon a monster with a cut-in animation. So you never really listen to the first song for more than a couple seconds. This is a problem because sometimes you can see it in the very first turn, like Traptrix Sera or even the normal summon of Traptrix Myrmeleo, this is often the first play you make so the basic song is instantly replaced by the other one. My suggestion for this would be having some rules for the switch to happen, for example:

• It can never happen in turn 1 or 2.
• Maybe it happens when a high link/rank/level(for fusion monsters) with cut-in animation is summoned.
• It could be random, with the chance increasing as more monsters with cut-in animations are summoned. Like first it's 0%, but it adds up 5% for each summon.

I make this suggestion because if these songs aren't used as much then they're a waste of filesize. Which is a shame because I really like the basic themes.

Random or Specific BGM

I do enjoy the feature you added where you can choose if you want to listen to your field's theme or the opponent's. But I was wondering if you could add a setting so the BGM is random or one specific you choose. This is important because there's some themes that don't have a specific duel field so it's literally impossible to listen to.

Cut-In Animation Limit

For some decks you constantly summon some of your monsters many times, when they have Cut-In animations it gets repetitive really fast. And even if you have disabled the summon animations in the settings you can feel the slow pace of the duel when playing online because your opponent might have them on. In Master Duel I think there's a setting that makes it so each animation only plays the first time. It could be a good thing to have here ON by default.

Deck Order

Currently, the deck list is sorted alphabetically, with the most recently edited deck appearing first. I suggest changing this so that all decks are sorted by the order in which they were last edited, rather than alphabetically. For example, after you edit a deck, it will move to the top of the list. The deck you edited before that will move to second, and the next one will move to third, and so on. That way the decks you constantly use will naturally be at the top. Adding a button to sort them back in alphabetical order could be good with this change as well just in case.

Replay Auto-save

I was thinking it could be similar to how replays work in Master Duel. Right now, you have to manually save replays at the end of each game, but it could be nice if there was an option where replays are automatically stored, like the last 10 or so, in an 'auto-save' folder (deleting or overwriting older auto-saved replays). This way, players wouldn't lose their replays if they forget to save them after a duel. Players could then access all replays and choose to save any of the auto-saved ones permanently by going into the Replay menu and saving them there.

Another suggestion related to replays is that the game should ask for confirmation when deleting them.

Case Sensitivity

In many parts of the game when searching it's strictly case sensitive, at least in english. This is sort of a problem because if you search in the deck list, cut-in list, mates and so on, things like "dark magician" won't be recognized because it's "Dark Magician" instead. Not a big deal but could be a small thing improve.

Selected Card

You added a feature I like, when building a deck you can see the detail of the cards and use the arrows to see the previous or next cards. One thing that could be improved is that when you click next or prev. the card in the panel changes as well. This would be specially useful when searching cards. Sometimes I use the arrows to find and read many cards but then I lose them out of sight. This could help. The scroll bar in the search panel could also move so it's centered.

And that's it for now. Thank you so much for your hard work!