It looks kinda inspired by soccer mixed with tennis? I like the visuals (also compared to my textbased codes vs. your graphics), how about a colour-option for each player/s teams or balls, also e.g. "rainbow" with a random colour of ball getting added? Or some difficulty-effects like "wind", that appears as icon on the top/bottom and getting it harder to real one sided goal, etc.
I was inspired by the old Sumo Volley, an old ICQ game, and a Rayman mini-game. But yeah, there are plenty of other types of this game out there. We are following a pixel-retro minimalistic aesthetics. I loved the wind idea! Thanks for that!
Here are the graphics we are using (made by Wictor Fontes):