I was playing around in Learn to Code 1 out of boredom, and I managed to crash the second page... I used the code below, and it worked on a subsequent run, so I'm not entirely sure what happened.
func moveForward(_ spaces: Int) {
for _ in 0..<spaces {
moveForward()
}
}
moveForward(2)
turnLeft()
moveForward(2)
collectGem()