The game seems promising. However, there are 2 main issues:
1) Online multiplayer focused games are extremely dependent on player populations, to the point that if you don't have enough people playing, the game is essentially unplayable. I realize it's a very impressive achievement for a game jam, but it also suffers for it. I ran around for a few minutes with nothing to do because nobody else was on. You have to consider population a feature, not a bonus. There should have been an announcement of some sort of upcoming tournament or something to get people to try it at the same time.
2) There should really be some walls or something around the playable area. I walked off the map just curious to see what would happen, and I kept falling way down, with no way to respawn back at the top. In a real match against other people, this would be a deal breaker. It's one of those things that's easy to assign low priority as a developer, but is crucial to the average player's experience.
Other than those 2 issues, the map is really nice, the art assets look good, the sounds and music fit surprisingly well with the cartoony theme, and I could see this being a lot of fun with other people.