Heya! Thanks a bunch for playing!
I'm really glad you liked the story. One of my biggest concerns with this demo is that it takes too long before the "real" game starts, so this feedback is really helpful to know what the game's hooks are! The full game is very story driven and I feel that's one of its bigger selling points, so this is great to hear.
The battle system is mostly unique to this game! It does take a lot of inspiration from many other games, and the core "skeleton" of the turn based combat is just standard JRPG fare, but the unique mechanics such as equipping cards and the EP-balancing special attacks are a wholly unique feature!
It's great that the game over screen in the tutorial made it easy to jump back into things (I forgot that it's even possible to get a game over there!) but I don't think it's ideal that there was confusion about which character you're playing as hahaha. I assume since you were accidentally attacking yourself, you must have been using the mouse to play (since keyboards and controllers default to targeting the enemy), so I should look into seeing if I can make it more clear which character you're controlling in that scenario.
Save files do persist in browsers, so feel free to continue playing if it strikes your fancy! You've only scratched the surface of what the demo has to offer!
I am aware of the music issue, which occurs due to very long load times for audio on HTML. Different computers seem to load the music faster or shorter, but it's really unfortunate you couldn't hear the music at all! This is a problem I'd love to fix (although I'm at a loss for how I might go about that), although the full game is a bit too big to host on Itch's browser, so while I don't want to treat this build as an afterthought, I would consider it somewhat lower priority to other issues for the time being.
Once again, thanks a bunch for playing, I'm really glad you enjoyed it! Please let me know if you have any additional feedback if you end up playing more!