Those of you who have observed Bounce lagging badly, what firmware version do you have on your phone? Some pre-production version or the sales release 42-11? An important graphics fix made in the software just before the sales release which almost doubled up the performance of Bounce so some lagging is expected if the game is run with an older software.

Also, the device has computation priority groups (cgroups) and Bounce is currently classified incorrectly to have only background priority. Fortunately this doesn't normally affect the performance too much when running only Bounce. But in multitasking situation it can potentially make it perform badly if other applications are open because all applications withing the same group have a shared resource usage limit.

About the official YouTube video, yes it is captured on desktop computer but just because it is much more convenient to do so, not to cheat. On the contrary, it actually has lower frame rate on many occasions compared to the device. The video was captured with a constant frame rate of 30 but for example the race level on the device has frame rate between 40 and 60.

The forest level is indeed bit heavier than the race but it shouldn't be noticeably laggy either. The fps drops to 18 in two places for a second but on the average it is running between 25 and 40.

- Miika (from Rovio)