Post Jam update

During testing I never played the web version so I never realized that when the game lags that player doesn't jump nearly as high which I fixed. I also now added a system which saves the game when you get a checkpoint so you don't have to play through the entire game in one sitting. Finally I nerfed some difficult jumps and added a new mode which can be accessed by holding shift when starting a new game, but I don't recommend it for new players.