Hard Hat Mack is based on the arcade game Crazy Kong. A word of warning: it's tough to play.
The first screen contains five platforms, four with gaps in. You collect the girders, put them
in the holes and rivet them with the rivet gun. You may move between platforms by climbing
chains or bouncing off the springboard. A lift is available between the top and bottom levels.
The next has three platforms at the sides of the screen and a lift going up and down between.
There's also a platform at the top of the lift. You should collect all the tool boxes on the
platforms and go to the top level, where a large magnet picks you up.
Screen three has a moving conveyor and a rotating one way lift system along with the platforms.
Your mission is to collect the girders and drop them into a rivet machine.
There is a time limit in which you have to finish. There are also other little men to avoid if you want to stay alive.