As I mentioned, the Singapore Universal Studios is quite small, so it doesn't take long to walk from one world to another, and you can usually spot another world in the background when walking around & taking photos.
The Revenge of the Mummy ride is meant to be good, although I didn't get to go on it. It was pretty hot and humid by the middle of the day, so energy and enthusiasm for rides gets drained pretty quickly.
I liked the cool Egyptian decorations though
The 4D Adventure was probably my favourite ride out of all of them, a fun storyline with 4D effects such as rocking/shaking seats, water sprays etc
Had to refuel with a Hainanese chicken rice and young coconut drink.. mmmm