Is it bad to let a hamster walk on wire in there cage?

Well for the wire it is pretty uncomfortable to walk on wire all the time. Put down fleece, cardboard, etc. Make sure its nothing harmful! & thats okay, she getting used to her new home and they like to bury and play and sleep a lot! Biting the bars, it could be dangerous but it helps their teeth sometimes my hamster does it too sometimes (but hes 2!) Anyways, I think you should be fine once you put something down so she doesn't have to walk on wire. For the ramp you can wrap whatever you use around it! Good luck :)))