Unexpected and fun take for a mech game :p
I can't really say i'm any qualified to judge the gameplay on this one as a have almost no experience with soccer games, but from what little i know and what i saw trying your game out, you did a good job at replicating the system where you switch players to intercept the ball from the current holder.
The keys layout is a bit weird also :(
That said, i still think the game itself is well made and i had some fun trying to get the ball from the AI team, and i also like the oldschool "majinger z" inspired (i assume ?) design of the robots :)