Your game is definitely a sport. There are plenty of sports that are based on throwing an object for distance. As always, I love the art style with your game. Such a simple style with a limited palette, but still looks great.
I enjoyed playing the game, but wished it was a little more fast paced. It took so long for the spear to come back down, even when I knew I already failed. Maybe something like a quick restart button would help? Overall great job.