Hey, I made a new game and everything was great. You should check out a few of the pictures in the gallery though, as I was able to walk through them. I found one by accident and checked another. The ones closest the the floor tile just need to be modified so they can't be walked by going in to the tile-set menu.
The default movement of the NPC's is a bit robotic due to the default frequency. This can easily be fixed by using the options.
Set speed to any that you want, Freq (frequency) At highest will move the NPC smoothly like in my game without them having sudden pauses. 2x Slower, or Normal is the best to have in my experience. I'm not sure why they didn't smooth the movement when making the new engine. There is so much the makers of RPG Maker don't do which leaves it to the community to sort out, or a paid DLC to fix. :/.
You probably may know this already, Movement type, allows you to set NPC's which can approach the player, move away from the player, or even a custom move route for setting movements. I hope that little bit of information helps.

If you could also add a different tile here in the apartments, this would give a visual nod that there is exit or an entrance. I was confused first time around, and so I wanted to share this now as I feel it could confuse players not knowing that the exit/entrance is to the side.
My last bit of advice is on the enemies, the pace of battle is slow, which again is RPG Makers fault, I am able to speed mine up using a script. There will be a way with your engine, but I would need to have a look to see if you can change it by altering a the script settings. I would reduce the HP of all the enemies to bring the speed of battle to a close sooner. Some battles can take 3-4 minutes which is pretty long. Make them short and snappy, that way it'll encourage wanting to battle more. It's totally something I would change from experience. Put longer battles in later in the game while players are warming up.