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