http://www.netrover.com/~timt/cheats/b/beavers.html (Amiga Plus Extra No. 5/97, 05/1997)On the title screen, type "ZEGOOLI" to start at level 8 or type "MRCLINK" start at level 15.
During play, type "BIGGIGBIB". Press 'F2' to skip levels and use the 'SPACE BAR' to select any position in the level.