Defeating the big robot
When facing the first Boss (the big robot), go over to the side but do not fall off. Shoot his arms and lasers as quickly as possible on each side. You can save time and health. If you get hit by lasers, do not worry because you will only lose a small amount of health.
First Level help!
In the basement, obtain 2 Z coins on top o' thee furnace. When you pick up the game, go up the steps. Go down, and go into the living room-(opposite the office of their DAD's). Lure the robot by going in reverse.