Search for your brain. (Sit on the title screen for 10 seconds)
Take out everything. (Defeat every enemy)
Jump over a flame. (Jump over one of Bowsa's fireballs)
Fall into a hole.
Figured out the buttons? Good. (Press each control once)
Go the wrong way. (Press left at any time)
Get some sand.
Give Dave some money for his project.
Make the steammachine work.