Need help with my game

Questions
#1

I need help, Ive been making a game for a school project and Im trying to make it work. Ive posted a couple of questions and Ive gotten help relatively quickly. I honestly do not know is now wrong with my game so here is my file. When I load my game, the camera sort of follows the player but the background is really blurry and then I fall through the map.

Here is a link to the game file.
https://drive.google.com/file/d/10_vnK-G9naRzm0YJ14DE6TH_uhVABggf/view?usp=sharing

#2

I am very greatful for all the help I have received thus far

#3

Did you use ortographic camera? It follows nice

#4

How does the game look for you? Does the camera jib around and stutter?