Help!

[ninjacookies]

I'm making mini game where you're a kangaroo robot and you jump over these boxes to make it to the end (kind of like mario). I put invisible squares near the edges so if you get too close to them it will run a questionbox saying "You lose! Try again?" and you click "Yes", or "No" When you click yes its supposed to move you to the beggining. It does, but it keeps moving the kangaroo forwards.