2D-Mario-style-platformer
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error trying to run
I keep getting this error code, any recommendations?

It's hard to tell without seeing the rest of your code and import statements, but it seems you may not be calling the Level class correctly in Line 9. You are using the same name "level" for both the object and class, so you may want to change to:
# creating Level object
level = Level(level_map, screen)
If you wrote the code yourself while following the tutorial, consider using "Level" instead when you're defining your class, following the pep8 convention of CamelCase for Class names.
Hope this helps, otherwise you could share more of your code for troubleshooting.