I think the advert is good because compared with more recent adverts there is definitely cohesion in relation to the style - talking more specifically about the 'cartoony' nature of it.
I have to say I think the advert doesn't make the ride look menacing enough. The advert for Thirteen for example was much more about the theme than the actual ride. I understand they wanted the ride to be the main feature of the advert but the style in which they've executed it, in my opinion, doesn't have the ability to instill fear into people.
I think they should have gone for a more sinister approach, bringing in perhaps a mental asylum aspect.