Pretty awesome game. Love that some part of the images are just implied.
I know that the primary goal of the game is not to assemble the picture accurately, but is there an exact final result anyway? My current state : Slight spoilers for the image:
The outer region beyond the red solid line is given. The green one is implied by the two ends of the half circle. The yellow and green dashed line regions are connected but could find a definite position. Is this kind the "end"? Or I could not find some clues.