Press the green flag. I got a bit bored, so I made a world generator. It was lots of fun to make, I got carried away with fiddling with the values. Feel free to change any code in there. I made it as customizable as I could. It's actually rather simple. I just start off with a (nearly) fully random world and mix it together (average it) a bunch. I make three (plus a fourth completely random one) different worlds like this and mix them together to add more randomness. Because of how it works (averaging), if it repeats too much, it ends up being all roughly the same elevation. (a bunch of random values between 0 and 100, averaging it out will give you around 50)