The idea was to get to areas of signal in order to "score", send back txt replies. Sorry, theres info on the game page here: https://bbyford.itch.io/thomas-was-a-phone
We decided to make the areas of full signals non-obvious so you have to use the (hot and cold) signal stregth to guide you towards it, however you should see a faint circle when your close.
To move, click and drag the mouse in the direction you want to go, if you drag longer and hold down longer you go further :) Arrow keys to move the camera left and right.