A 4-player-mode really is a nice idea for this game, because in terms of gameplay, "4goal challenge" caters to this. It would also be great, to have even more play-modes, such as "player1 + cpu-player vs. player2 + cpu-player" or also "player1 + player2 vs. player3 + cpu-player" etc. A tournament-mode could also be fun, where the losing teams are always eliminated, until only one team remains. And the selectable cpu-players maybe could also have different play-styles. Just some suggestions. :-)
Thanks for the feedback and for playing! You're spot on—the upcoming '4GOAL 4P' version includes those exact team variations, plus a full tournament mode where teams are eliminated until there's only one winner left.
I'm aiming for a release in the first half of April. I'm really glad you enjoyed the core gameplay, and I hope this series continues to bring a lot of fun to everyone. Cheers!