Instructions
Walk to the bottom of the level to get the additional fourth dart.
Aim a "Max-power shot" at the center of the right wall toward the top of the level. With correct aim, you can break 20 of the balloons with one shot.
Shoot the remaining darts low toward the base of the screen. Aim to get the darts between the rubber walls without actually touching the walls. Avoid using a large amount of force when shooting the arrows, to ensure that the arrow doesn't bounce off the rubber wall at the end of the tunnel.