Thanks for the downloadable build!

I have some suggestions and bug fix solutions... here we go:

1. Black/White contrast can hurt eyes: You can replace white with gray and also create a selectable color sets (for example red elements on dark red pitch).

2. When the ball run straight adjacent to wall, it's not possible to change its direction anymore. A solution, like for the original Pong, is to let the bats bypass the walls, so the ball can be hit with the top/bottom part of the bat.

3. The movement stops after a point. At high ball speed this make impossible to reach the ball again when bat is at the top/bottom position.

4. When hit, the ball should ever pass throug the bat and go the rival pitch direction. This will be important when playing in 2v2 mode.

5. The 2v2 mode should not so be easy to implement because 2 team players can easly cover the goal size. I dread also that the action may be result confusing. In this case, an idea is to divide the pitch in 4 sectors (something similar to foosball), occupied in order from left to right by Team A GK, Team B Striker, Team A Striker, Team B GK.

That all for now... cheers :)