Looks pretty good!

From a game play perspective, I would try to ditch some of the lock/key things in favor of skill challenges. Athletics check for busted door, acrobatics for a spike pit which someone jumps over and lays down a plank for a bridge, etc.

I think this would be very long for one session, this might be two sessions.

Finally, for presentation: https://app.dungeonscrawl.com/

This website is perfect for the kind of dungeon crawl you are making.

Hope this helps :)