Drawmaster gives you a gun that fires along whatever line you draw. Each level has targets behind cover, and the puzzle is drawing a path that curves around obstacles and hits them all in one shot.
Ink is limited and shots are limited, so the elegant solution — a single sweeping curve through every target — is usually the intended one.
Draw a single flowing curve that passes through all of them in sequence. Sharp corners cost the shot momentum, so a smooth path reaches further.
Yes — path length is constrained, which is what makes an efficient route the puzzle rather than an obvious one.
Yes — draw with your finger. Nothing to install.