Ending 1: click the option "So, where are we going?" or "we've been going for a while...", then proceed to always click the option "are we there yet?"
Ending 2: when you're on floor -13 click the option "please hire me!"
Ending3: Playing the slot machine until the assistant says something. Then wait until you're on floor -23
Ending4: while the game just started, click on the number "4" elevator button 4 times.
Ending5: When the full course meal appears, select all the ones that contain NO animal products, then when she asks if you have any pets select the option "I do not own any pets". When she gives you the scenario with you, the old man and the dog on the stranded island, pick the option "I'd eat the apple". Finally, when she asks if you'd give your tongue to leave this elevator, select "No"
Ending6: Trade places with the entity on floor -445
Ending7: Pick various answers while she is questioning you before arriving at floor -250. then just wait it out till floor 666
Ending8: reach floor 0