Today I was looking for new or popular games on App store and I found out that Jetpack Joyride is the number one popular game right now.

Google: Jetpack Joyride is a 2011 side-scrolling endless runner action video game created by Halfbrick Studios. It was released for iOS devices on the App Store on September 1, 2011, and has been ported to other systems.

I think the reason why this game is popular because of the new update. Version 1.21.5. The update has fixed some bugs to make the game better. It has a 4.3 rating on App Store.