Nope, just went strait down.
That shouldn't be possible! Thanks for letting me know, I'll work on a hotfix and post it after the ratings are over! If you want to, go left before heading there and you'll be able to finish the game. Thanks again!
Oh, I figured out what I was doing wrong. I was stuck in the room with the key for the double jump chest. At first I couldn't figure how to open the chest so I figured I needed to come back for it later. I tried again, and this time I just mashed a bunch of keys until it opened. Now I have the ability. I was just being thick headed, but maybe add a button prompt over the chest in the future. Thanks for your help.