Peco desculpas, mas isto é complicado demais para mim.. vou continuar em inglês...
No problem, but I'd be glad to translate them myself (hope to have some time later tonight.
I haven't defined the size of the field because it depends on the table you have available. However, a minimum and maximum size could be indicated. There is a minimum height because otherwise the ball would easily get out of the field.
The video that was posted features two teams of 2 players, but some Polish AFOLs (don't have a link available) reported that using all four PF channels at the same time resulted in delayed order execution

which is why I decided to make the game 1 on 1.
If you have any suggestions to improve and or extend the rules, please let me know.
Finally, we plan to have a TechBall competition at the 2nd HispaBrick and after the event I plan to do a short write-up about it in Hispabrick Magazine in Spanish and English (including the rules).