Last boss is easy. Get the chicken to magic burst him and the blocks become metal. Dodge the blocks he kicks until there's only two. Use the chicken to turn the gear and lift the platform. Jump off the platform and shoot him in the face. Rinse. Repeat.
Align the stencils on the right image. Then grab the stencil at a crosshair and move your pointer to the same crosshair on the blank canvas. If no crosshair is available grab on a single line and estimate the distance to the closest crosshair.
I agree with most here. Good game, but survival mode gets boring after a while. Maybe have levels with point/combo requirements and have the levels get harder with a higher red:non-red ratio.