Level select
Note: This procedure involves editing a registry value; do not attempt this if you are not familiar with working with your system registry, as a mistake can cause serious problems with Windows. Start Regedit and use the "Registry/Export Registry File" menu option to create a backup copy of your original registry. Find the following registry key:

Cheat Codes
While playing a game, press T, then type one of the following codes to activate the corresponding cheat function:

Cheat Codes (demo version)
While playing a game, press T, then type one of the following codes to activate the corresponding cheat function: