On the first level, make Mowgli run all the way to the right until you get to the briar patch. When you see Mowgli recoil at the edge of the place, you know you're in the right spot. Jump into the canyon and pause the game right before you're about to fall to your death. While the game is paused, press B, A, Down, C, Right, A, B, Left, A, Right, Down, B, A, Left, Left, C, Up, Right, Left. As soon as you do that, the screen will change to the Debug Menu, which features level select and a host of other options such as invincibility.
To start right next to Baloo the bear, pause the game and press B, A, Left, Up, Up.
To change the color of the screen, pause the game and press A, B, B, A, C, A, B, B. Eventually you will get to the last color, which is blood red.
Enter one of the following button combinations while the game is paused to display hidden developer messages.
Enter the following code at the Pause Screen....
A - B - B - A - A - B - B - A
Then when you un-pause the game you should have added 10 seconds to your time