Planning on moving Rumple

Rumple is my 1 year old girl (she was thought to be a boy, but then turned out to be a girl, and was already familiar with her name so it stayed). Before I got her she had free reign of her old house - but had a crate. Something like that.

She has really good manners with wires, furniture, walls, trim. Essentially, I trust her more than my 3 other pets. For now, she's in generic cage at night and some days. She's super depressed in it, though, so once we move (within the next few weeks) i'd like to make the spare bedroom/office her 'home'. I'd like to put a swing baby gate at the door to keep her inside when needed (and to also keep the other pets out).

I just need ideas on things I can do to make it more fun for her. I would like it to look 'put together' per say, and not a million things strewn around the room - since it will be functional for us humans too.

Any ideas on how I can make it fun for her, and products or things I can make?

be sure that she can't get through the slats on the baby gate. one of my bunnies is always trying to find a way out of her cage area and the holes in the cage are only 1 inch square. she'll stick her entire head out if I don't have the holes covered with something.

as for toys I bought a tunnel from the cat dept at the pet store. it's about 24" long. the one i bought doesn't have the three tunnels but i like that one. my bunnies really like the tunnels. i also bought utility trays at walmart for $4. the bunnies like to dig in them (I put bedding in them so they can dig) and they like to hop to the upper trays. i only have two stacked, not three.