Campaign Modes - At the Player Select Screen, Push the letter "C" five
times. You will then get to chose one of three campaign modes.
Hidden Pictures and Themes - Go to the data folder and open the sound
folder. In it you should find hidden pictures of Kurt, one of the
creators. In the theme folder you will find different themes for your PC.
Level Editor - At the main menu hold Ctrl and push E 6 times for three
options: Make your Own Level, Edit a Level, and Quit.