woot, yay someone with an Ouya to start testing :D
1st. There is no WebGL for Android devices as of yet :( And maybe not so much in the future.
2nd. Can you tell us what a blank screen FPS is? ( ie nothing)
3rd. Tell us what your game FPS is at.
4th. All Controller capability that is working and not working.And does it support multiple controllers.
5th. Are you using CocoonJS or stock browser? If not is there away to get CocoonJS version up and running.
6th. Not having the primary buttons is a serious killer for making games :(