Really cool concept for the game! I wander how you managed to think of whole auto-chess system in this short period of time. Although I am not very good in this kind of games i managed to buy random hololive members and managed to only loose once with spamming short-range dps at one place brawlers in from and rest in the back. Also i didn't get until a bit of time the idea of synergies, I think this could be a bit more specified, maybe something like in tft? I also had a problem that i couldn't maximise the game, which kind of sucked because i couldn't read or see some of stuff.
From the minor things, I found that i can't put back a character once i pick it up, I either need to place it in different spot or place in on the field, and you can add fade in/out on the music so that there isn't such hard transition. But I overall really liked it!