I see an N64 emulator, sure, but have you figured out about the C-buttons?
You have your analog nub; your D-pad; the shoulder buttons; Z would be awkward on X or Y; your A, B, and Start;, but where would you have the room for C's? With every config possible, you have one more N64 button than GCW inputs.
In this case, mapping C-up/down/left/right to Y, B, X, and A, and Start in its place... map EITHER A OR B to Select.
No, I see the emulator, but I can't imagine playing it. Unless you had a USB controller, N64 or likewise. But then that defeats the purpose of portable N64 gaming.