This is an odd...level... Anyways, go to the swf file. Sit at the welcome screen until the little video thing comes up. From there, right click and choose "play" The manual will come up. Right click and choose play again. You will be at the level select screen. Now, right click and press play again, and you will be in level "undefined.undef"
Go to the swf version of the game. On any level, beat the boss, and on the first phrase they say in the cut scene, right click and press play. If it does not say (your level).4, then right click and press play again.
While playing the flash file of the game, when you die, inbetween your death and the game over screen, rught click, press play, repeat immediatly, you will go into the begining no matter how many lives you have.