My students and I are having trouble with having a character jump more than once. I have followed the code on Game Design Help (https://www.tynker.com/support/game-design) and I also tried practicing with the "Jumper Man Game" template. After pressing the key assigned to jump, the character does not respond to the jump command anymore. There does not appear to be any other keyboard commands that are in conflict. Is this a glitch or do I need add something else? Thank you for any assistance, I'm so frustrated!