Through hacking the game, I got a few passwords. I couldn't get more, because the thing is very very wierd. By the way, it seems the game was programmed in C. It would explain why it doesn't play that 'good'.

Passwords I got so far:

MRSCQ - Level 2

SCRCI - Level 4, 1 Bottle, 11 minutes left
SHAPF - Level 4, 2 Bottle, 80 minutes left

PIECD - Level 8
PALCN - Level 8, more bottles, 15 minutes left
PALSP - Level 8, maaaany bottles, 25 minutes left

BAHAN - goes to a different stage. I don't know which though. I checked all SNES levels, and none of them look like this one. So either it's a lost level, or something that's only in the PC version, I'll check later.

BAHAH - same as above

JOUZZ - all it does is play a 'squeek' sound. Maybe some sort of debug or level select, but no idea as to how use this one, have fun.