Thanks for the reply dude. Yeah, I got around it in the end by stepping a variable instead ( no loops ) so it'd load each level thumbnail one at a time.
I'm still having odd issues trying to get the Ajax to work consistently though - is it like browser fullscreen requestes, where it must be linked to user input?
I had things initially on a touch/mouse/keyboard event, but on changing them to "On Start of Layout" event, they don't fire.
I'm wondering if there's a different/better way to pull down the data from MySQL to load/save levels and high score info?
P.S - you game looks great - very creative take on the classic tetris!