My high score was 1980.
It was all thanks to Gravity mode too.
If I had played any other regular mode, there is NO way I could have gotten that.
In Gravity mode, the fish neggs are worth 900 pts! It definetly helps.
Gravity mode took a bit of getting used to. I kept pressing the up key and thinking if I held it down, i'd go somewhere.. that's not the case. It's more of a 'stop and go' technique. Where you gently press the keys whenever you need to. The up key does make you go forward, but if you press it with another key, you go in circles and end up in the black whole.
The idea of gravity helps too when getting neggs in difficult places.
Here's an excellent guide that helped me a lot!
http://www.neopets.com/~Striped_Tiger156
*gasp* You. are. the BEST!