WASD or Arrow Keys to Move. Click or Space to Throw Ball (hold button before throwing for more power). Mouse Pointer to Aim. The longer you Hold the Throw Button, the more Power that will be in the Throw. Touch the Ball to Pick It Up (you can only pick it up when it's not moving). The ball bounces off of the edges of the screen. You can use this for trickshots. When the Shade of the Ball changes, and a Cross appears on it, that means it can Kill You. You are the Blue Ball. There are no Teams.
My other game that has a thumbnail: https://scratch.mit.edu/projects/728311011/ Enemies can't actually aim, they just throw in a random direction, except when it's just you and one of them. There are some issues, like you sometimes not dying when you get hit by the ball, or only giving you one kill when you hit more than one enemy at the same time. If you or an enemy is inside the ball when it gets thrown, it won't count as a hit on them. This isn't really a bug, just a quirk with my code. I can find a way to change this if you want.