explaining how to get all the endings:
ending 1 (good end) - choose all the nice options (sheep are cool, you like vegetarians, no i'm not the first kill, i deserve to die, i would be willing to die if everyone else could live, i'm scared of what you'll do.)
ending 2 (bad end) - choose all the mean options (sheep suck, you hate vegetarians, i am the first kill, i don't deserve to die, i wouldn't be willing to doe if everyone else could live, i'm not scared of what you'll do.)
ending 3 (neutral end) - choose an even amount of nice/mean options. for example (sheep are cool, you hate vegetarians, no i'm not the first kill, i don't deserve to die, i would be willing to die if everyone else could live, i'm scared of what you'll do.) pretty much just even out the mood meter so it ends off on neutral.
ending 4 (secret end) - you can only obtain this if you get all the other endings first. choose all the nice options (sheep are cool, you like vegetarians, no i'm not the first kill, i deserve to die, i would be willing to die if everyone else could live, i'm scared of what you'll do.)
hope this helps :)