It looks great to me
. Assume it is a dwarf hamster due to the small wheel. The only thing I would add is a good sized house for nesting that is open underneath to the substrate. You might already have one but I can just see the little plastic house.
This labyrinth house works well for dwarf hamsters. Or you could just make a house out of a shoebox or tissue box.
Trixie 6201 Natural Living Leif Labyrinth House 35 ﾗ 11 ﾗ 25 cm: Amazon.co.uk: Pet Supplies