In the NEW GAME menu, type the following as your player name to skip to
   levels 2 through 19:

   mayday
   victory
   challenger
   azimuth
   revealed
   stoneage
   warfare
   oxygen
   skyhigh
   sunshine
   blowup
   neuftrois
   baracuda
   giveaway
   waterfall
   seventeen
   neartheend
   y2k

   These codes'll help too, dunno if they should be player name or not:

   dogmode - activates god mode control in in-game cheat menu
   stoneskin - activates infinite shield control
   pianist - activates enemy shot control
   boooost - activates infinite boost control
   kinput - activates string control in the CHEAT menu, in which you can type
   reflux - infinite Flux Beam ammo
   greens - infinite Phase Shift Cannon ammo
   firecrackers - infinite Hellfire ammo
   nails - infinite Titans Hammer ammo
   volcano - infinite Magma Cannon ammo
   lightning - infinite Elctronic Laser ammo
   staystill - infinite Stasis Cannon ammo
   listener - infinite Sonic Cannon ammo
   bloody - infinite Plasma Cannon ammo
   stormfire - infinite ALL WEAPONS ammo
   getridof - infinite ammo on no weapon

   ALL CODES ARE CASE SENSITIVE