only f2p if you play on the main website because let's be honest this is kongregate, but I have got to level 50 in a few months without paying real money off the main website.
Well I played Pirate Galaxy which is one of splitscreenstudio's most popular games and the graphics and game play were amazing so I hope this is the same.
In team dogfight you could have objectives for each map like; Axis have to destroy the boats on pearl harbour while the Allies have to protect them in the given time limit, and to do this you would have to finish the bombs and torpedoes.