Couldn't get past room 1.2!
Not that I'd expect you to know this just yet, but the first thing to do before laying out level arrangements is to establish what we call your "player metrics" - which means knowing jump sizes, etc - and there's always a difference between what is technically possible and what's realistically possible in that regard.
Still, nice extension of the workshop into something bigger, and it looks like you're teleporting the player around rather than loading/unloading the level, so you definitely picked up some new tech skills! Keep it up! ;)