On the title screen type in "LISTEN TO THE WHALES" and the screen should flip over. Now during the game, you should have infinite energy. The life meter will still decrease, but you won't die. If you fall in a hole you'll still die! Also, when you reach the taxi level type in "JIMMY HENDRIX" for an indestructible cab.

First, go right, collect the gun, then run to the right and jump over the first elevator. Keep running to the next elevator, go up three times and walk onto the elevator that's waiting when you arrive. Go up, then left and collect the gun. Now go right to the next elevator and down once.

Go onto the next elevator, and go up as far as you can see. Walk right, off the elevator and run right to the next elevator, picking up the object on the way. Go up on the elevator, run right and go down three times on the next one that you come to. Run left, go down on the elevator and run left again to collect the object. Run right to the first elevator and go up, then go to the next elevator and go up twice. Run right and go up on the elevator once, then run and jump right. Collect the heart, run right,drop down through the hole and run to the exit.