I really like the graphics; they're very charming.
I did get to play online! The game's a blast. However, I think the game would benefit from a better way to distinguish whose lawn is whose; does the arrow indicate what lawn is mine or what lawn I should blow towards? It'd be great if each player was a different color and their lawn were the same color.
It also lagged a bit.
Other than those things, I really like it! The gameplay is solid. I wish there was a single-player mode, but I understand ya didn't had the time to add that, considering it's a game jam and all.
Overall, great job!