Advice on frame rates

hey normally im used to animating and such on 30fps. Now because of a new script im using in one frame (its a game , inthat frame is %30 of game) i need to use 60fps all round… kinda a bummer but at least the game will be smoother.
Anyways wondering what is recommend, i can highlight each animation i have thrughout the whole movie and basicly double each section to make it same speed, or should i just continue using 30 and double stuff at the end.

only reason im saying this is cuz its real hard to animate at 60 fps… lotts frames and confusion