How do I

How to Limit jump? i want to jump my character only 1 time.

How you mean only one time ?

i mean you jump an you cant jump after first jump like mario. you can jump mario one time

Easyest is to dissable the jump key. But then u have to set 'default controls' on 'no' in the behaviour. And simulate (thats an action in sprite > platform) all the keys. Ex. : When left key pressed > simulate left.

For the jump you need a variable that you set to zero on start up. And set to 1 when player jumps.

So logic for jump is this.

In the same event: 2 conditions combined :

Up key pressed

variable = 0

actions :

simulate jump

set variable to 1