I want to make Zim's tank more natural looking, especially if this is to be his permanent home. (in case I don't get the rack)

Right now he lives in a 20g long tank with two natural looking hides.

- kinda look like that.

a water bowl that is just a regular ceramic dish.

The substrate is newspaper, and while it is easy to clean, I wouldn't mind putting in a bit more effort during cleaning time to make the cage look a little nicer.

Any suggestions on making the cage look more natural, like the corn snakes natural habitat, including plants and substrate?