when you get to around 300-400 score the game breaks and a massive chunk of nothing spawns and you cant climb anymore.
The game works by using segments that load an unload. One of the segments made didn't save after it was finished an since there was so many segments we just didn't happen to come across that one segment in our playtesting. Thanks for bringing this to our attention an that segment will be fixed immediately after the voting period ends. Besides that though I hope you had a great time with the game!