I can't really expain how to U-turn...the only thing I can think of that you might be doind wrong is holding the arrow key too long. Dont release when the meerca is facing the opposite direction, release just before he is so yodont overturn.
i cant get the hang of gravity mode, ive tried a hundred times, but it just doesnt work for me... so i dont have a very high score
I just tried superhyperextended gravity mode and i can get like 3 neggs before I die. I guess you have to get fish neggs :/
the startegy i use is to always face almost 180 degrees from the drain, use slight angles to dart around.
Its really not hard lol. I can get like 900 every time, and I can get alot higher then that. The avatar is even an easy one to get. All you have to keep in mind "and this really helped me" DONT STOP. Keep the guy moving at all times this is for the big bowl cheat.