Please help getting Pixy programming manual info.

I'm programming on Arduino with the Pixy CMUcam5 sensor, a provided sample works. I'm able to read blocks over IC2 connection but thats about it.

What i dont have is a command list, and object structures overview I cannt find any programming documentation except for some samples, of this device. I'd like to know what commands are in the Pixy library and what they do, and how to use them.

Does anyone know of such a manual and have a link ?

I'm not familiar with the sensor, but did find this the correct item?

I know that link its not usefully, only schematics of the board, nothing about its code there.