We had to do something similar; we're working on getting performance to a place we're happy with, so we're just using the mouse right now. We just grab the original resolution in a readonly at startup, and on OUYA we add the difference in current r…
We ran into a similar problem, didn't use the Unity plugin, built the game and deployed it onto Ouya. Using the trackpad would result in repeated "App has stopped responding. Wait/Close". Using a mouse worked just fine.
