Dunno if it's too late for input, but I enjoyed this one! It's simple but fun for what it is. Arc was my favourite.
The menu system is really glitchy, though. If I play Practice Mode before doing Adventure Mode, the Practice Mode menu sometimes pops up after I win a match. Sometimes the scroll button spell would disappear as well, even though I didn't change my mouse or anything like that.
Aside from addressing these bugs, I would like to see more maps and possibly more characters. You could also add a summon spell with new enemy types. Team matches would also be nice.