It's a good start, but needs many more climbing areas. Try to add more sturdy plants that can take a crestie crashing around on them. Also I would suggest adding vines horizontal climbiing areas also. Crestie's love to jump & climb. They also like to have the security of many hiding spaces. If you don't want ot worry about having to keep plants alive, try getting some fake vines from Wallyworld or a craft store. Also invest in some fake bendable vines from a pet supplier (thicker is better).
Great start tho. And as soon as there's more vines etc, your crestie will be able to enjoy all the room you've given her =)
