Scratch

Just took a look at your game...you have a lot of things working off of the X scroll value using IF X Scroll = (some value).  That's a little risky as your project might change the value of X Scroll right over the target value so fast that the other parts of the project don't catch it.  Even if that is not the case, trying for an exact match on a number can sometimes backfire because of the way that computers store numbers.  A safer method would be to use the inequality operators...something like IF X Scroll > (some value).  Give that a try and see if it helps.