cadomax tells you whatever you want to know

I know, that's not friendly; but I don't want to explain everything in detail.
Some help if you don't speak french:
"Posez une bombe" means "Plant a bomb in a certain place".
This is a complete list of all levels; clock the one you want to see and it will show you the right place.
"Tuer les ennemis" simply means "Kill the enemies"
And normally the other parallel dimensions require a key which wou will find somewhere (mostly in a parallel dimension)