Thanks for the comment!
Creating a good platformer controller from scratch is quite a challenge as I found it this jam - something that definitely needs to be refined alongside the level design rules. I came up with the alternate ending idea precisely for what you said - I wasn't too sure if I could balance the last challenge with the timer well enough so gave an option to skip it and an easy way to get back to that location from the ending screen.
We'll see what I decide to do in the future ;)