Thank you guys. I was having a bad moment with this issue.
Is it possible to have the same Jump Button for the Double Jump?
I tried, but it doesn't work. I tried to have the A button for both, but if the key is the jump button it doesn't work as a double jump button. Any idea?
I also changed the double jump condition to "if it's not falling" because I don't like to have a double jump when the player is falling.