And you have NaNed objects (the mine and gold outside the border). Go through the level data and remove the entries "6^684,540,3,0,2,NaN!" and "12^372,NaN!"

I'd remove some of the gold, though - it should be used as an incentive for doing things the difficult way or doing something well, rather than dropped everywhere in a corridor you have to go through. You could also cut down on loading time by placing smaller clusters of gold, and placing the mines further apart (they still form an impassable barrier if you place them one tile apart, instead of half a tile). Also, avoid hiding traps behind gold - it requires the player to be psychic rather than skilled, although I understand that it fits the Indiana Jones theme.