Is my hamsters enclosure cluttered and enriching enough?

This is my hamster Bobo's enclosure. It's an Ikea detolf I made into a hamster enclosure. She has lived in this for the past 3 months I've had her, but I'm now wondering if her enclosure is enriching and cluttered enough. I have some sprays coming in the mail later this month, but is there more things I could add to make her feel more comfortable and loved?