I was able to build two different input configurations on a breadboard.
One was using a potentiometer as an input for a knob movement, and the other one are just plain buttons.
It took me awhile to research and understand how I will be dealing with multiple button inputs as the ATTiny85 has limited input pins. The answer is using a resistor ladder to an ADC pin.
I'll talk more about these at length in my upcoming update video.