There is the Sensitivity setting in the button-mapping section. --EDIT-- Haha, littleguy beat me
I had this happen on project64 for pc as well and in the end I had to download a specific plug in for it to work. Could I use that plug in on super 64
I would recommend uninstalling SuperN64 and install Mupen64Plus AE instead. SuperN64 is just a clone of an outdated version of Mupen64Plus AE, and who knows what else the publisher might have added to the code.. I'm suspicious of anyone who publishes a clone of an app that is already free on the Play Store (they must have some motivation for doing so, and I suspect it isn't the end-user's interests)
But to answer your question about whether a plugin compiled for the PC could be used in the app, short answer is no. Plugins compiled for the PC will not work on most Android devices, due to different CPU architectures (ARM vs x86). Besides that, Project64 is Windows-specific, so even if you had an x86 Android device, there is a good chance any custom plugin for Project64 is leveraging Windows-only APIs. And even if that isn't the case, plugins written for Project64 won't always automatically work on even the PC version of Mupen64Plus.