Congrats on finishing your game! I got one of my teammates to join and he killed me three times. I'm not sure how though because it looked like we did the exact same attacks at the same time.
This game looks pretty cool for a short jam game. It's just oozing with style. I'm not sure how or why it happened, but when the full attack combo happened, it looked really cool.
Unfortunately, the gameplay just doesn't cut it for me. (sorry for the cut pun!) Online multiplayer games are super ambitious, exponentially so for a game jam. It's impressive that you got it up and running, but the controls just don't feel good. Everything is just a bit slow and/or delayed so it's hard to react and time your attacks effectively. I tried parrying but wasn't sure if anything was working. More hit feedback would help this a lot, too. I couldn't tell if I was getting hit or taking damage.
Still, you made this in a week and that's super impressive. Keep making games!