Start your game with these command lines, bstone "CODE":

     POWERBALL - Enable Cheat Mode 
     TICS - Display TIC infor 
     MUSIC - Change music by pressing Backspace and an arrow key 
     RADAR - Show radar 

Start the game with the command line - bstone powerball. The Jam logo will appear.
Hold left SHIFT then press and hold right SHIFT. A chime will 
sound if done correctly. During gameplay, press BACKSPACE
then enter the code.

     G - God mode toggle 
     D - Invisibility 
     W - Level warp 
     E - End level 
     I - Free stuff 
     O - Show hidden walls on auto mapper 
     U - Unlock level 
     S - Slow motion toggle 
     T - Show walls, sprites, and sound waveforms 
     B - Change border color 
     C - Show statistics 
     F - Show x and y coordinates 
     H - Hurt yourself 
     M - Show memory usage 
     P - Pause 
     Q - Quit 
     V - Extra VBLs 

These codes work in the full version only:
JAM - full life/ammoaccess cards/guns, score drops to 0. 

     6+7 - All bonus items 
     7+8 - Kill actors 
     6+8 - All bonus items/kill actors