If that winds up being the case, here are som solutions for that:
You could try to do what @L.Bthenightmareclown said. You could make the levels get harder and harder and make the areas get bigger. Such as the first level is like small, and as the levels get harder, they get bigger. And this basicaly gose on till the hardest level is the biggest.
Like @Coral said, you could use props. Know, I know you called them ugly, but theres many so if like you wanted one to be a certain one, im pretty sure you’ll be able to find one for said idea for the level.
There may be other people who have asked the same thing, so mabye you could look at other articals/posts. You can also look up how to resolve this issue on platforms like youtube and google.
Make the walls 1 wide and use floors for the ones that aren’t the walls. Also, you can use barriers if you need even more. If you need even more, make an emoji.