Brain for Monster Truck is a drawing puzzle in the vein of Brain It On: a monster truck needs to reach the end of a level, the road is broken, and you draw shapes that become physical objects to bridge, ramp or lever it across.
Ink is limited, so the elegant solution is nearly always a small one — a short ramp in the right place rather than a whole bridge. Levels get inventive rather than merely harder.
Whatever you draw becomes a solid physical object with weight, so it can support the truck, tip over, or fall — which is what each puzzle is built around.
Yes, which is why the intended solutions are usually small and well-placed rather than elaborate.
Yes — draw with your finger. Nothing to install.