Thanks for the feedback!
If the scale was the same you could easily drag an object over the reference and get the right scale. We wanted to have some reflexion about the scale. You're not much punished for mistakes, so don't hesitate to try things :)
The same thing goes for displaying how close you are from the absolute location, though I think it could have been a bit easier on that side, with maybe grids easier to read and maybe some snapping? (not sure about that one)
But you know we ran out of time and there was very little time to test the game and see how difficult it is.