-Yh you can change the mouse speed with the linear potentiometer 
- Yep the temperature sensor is facing me like in that pic: http://farm9.staticflickr.com/8044/8134573901_63952a4f17.jpg
And when I do:
Serial.println(Esplora.readTemperature(DEGREES_C));
I get:
-50
-50
-50
-50
... etc all the time