Mobile game developer Backflip Studios says it has now racked up more than 65 million downloads of its games across iOS and Android.
"November was our best advertising month to date, which December should easily trump," CEO Julian Farrior told Mobile Entertainment.
In October, Backflip said it was making $500,000 a month just from mobile ads in its games, based on 53 million downloads and 15 million monthly active users.
The developer isn't relying only on ads, however. It has launched a $0.99 'Deluxe' version of its NinJump game, which has already been downloaded more than seven million times in its free version.