Hold on the wheel and turn it to adjust flow. Pull the lever to full shut off water flow. Sorry that the wheel skips from high to low flow when you turn the wheel over the top part of its rotation. I tried multiple things to prevent that, but couldn't get anything to work.
Maybe I could make this into a game or something, but I just finished all of the complicated mechanics and that coding stuff. Maybe later. This was way to complicated to code in relation to the simplicity of the interaction itself.