Space to start, b to boost your speed. Avoid basically everything, especially the shark. Grow as large as you can until you die. I think g, 0, h and some other keys control music and other things, I don't remember. Good luck!
This is a really old game that I found in my old projects, I don't remember any sources but these are all photos from Google images. If there is some copyright issue or anything, please let me know (none of the looks are mine.
