So the game doesn't have an end after all, sadly. For those interested, after the jungle the layers start repeating (jungle, deep gravel, desert1, desert2, jungle - I don't know what happens next)
I think it goes back to deep gravel
Gravel -> Deep gravel -> Desert -> Wasteland -> Jungle -> Deep gravel -> ...
It just continues without the first layer, I think it's mentioned in the wiki somewhere
