You don't need to overwrite your save. You can start a new game in any slot.
Green lava generally = slime/acid
And Notch said "he shall do my wonders."
Too many pinkie pies
I always thought that yellow thing was a beak of some sort. BTW, you can enter the artisan's speedway without talking to the dragon in wizard's peak
"These cows are so smart!" Cows walk into lava and kill themselves.