As much as I dislike being negative about small games, i just kinda have to give it to this one. The concept is fun, and it surely can be fun for an hour or 2 to fight with friends, but that's it.
The multiplayer is kinda dead, the discord server kinda as well, though I'm sure if you look long enough you will find someone to play with, but that's the problem. Without the multiplayer the game has little to offer and after 40 minutes I struggle to find a reason to keep playing it, which means for me that the experience is not fun enough to make me care enough to look for someone to play with.
The price while it's not much is already hard to justify since it feels more like it should just be a free to play little project game and in my honest opinion the character packs each for 2 or 3 euros are just completely unjustifiable unless the game were free, but that's not the case.
So, just to clarify, I mostly don't recommend it because of the mostly dead multiplayer and odd DLC/pricing policy. If you want a short fun 1v1 against friends then there are just better options out there like e.g. Stick Fight or Rounds even though this is unique but just not good enough for the money.