I dont know how to jump backward with salto(SOMERSAULT), to jump higher. I dont know what keys on keyboar i need to use ;]]] please help me !!!

Please breathe slowly... Try not to **** your pants while writing.
It's the backspace (http://img480.imageshack.us/img480/8382/keyboardyb3.jpg) key. Right on top of the Enter one.

Teh jumps:

Enter = normal jump forwards.
Enter x2 = small hop backwards.
Backspace = jump straight up.
Backspace x2 = somersault.
Back space x2 + Enter = small somersault which I think achieves the same effect as Enter x2 but with a different sprite.
Backspace + Enter = another combination for Enter x2.

Teh jumps:

Enter = normal jump forwards.
Enter x2 = small hop backwards.
Backspace = jump straight up.
Backspace x2 = somersault.
Back space x2 + Enter = small somersault which I think achieves the same effect as Enter x2 but with a different sprite.
Backspace + Enter = another combination for Enter x2.
I have never heard of the last two. I will have to try them out later.

I have never heard of the last two. I will have to try them out later.

Ya learn something new everyday. :)