Hi @heath.kelley!
I believe the error is in the looping below. This post explains what an overlap error is. I believe the program is not able to check the position of the rockice because of line 63. “rockice=500” doesn’t specify which property of rockice should be manipulated. My guess is that the student meant to move rockice.x? When I changed line 63 to move rockice.x off the screen to the right, it worked. You might also check line 59 as well and make sure that points to a specific property.
Good luck!
Michelle