Gorgeous little one you have there!
Like the glass tank you have too with the front opening doors! I`ve never seen one of those before, do you know the brand name?
I also agree that sunflower seeds are a beneficial part of a hamsters diet as they have vitamin E. A few added to her daily diet is fine. It`s the yellow corn/maize I would remove as corn contains a natural starch which turns to glucose, so you could just pick the yellow corn and flakes maize out and replace it with something as simple as....plain dry porridge oats!
Oats are loved by hamsters and although they contain beta-gluten, it is not the same type of gluten found in other foodstuffs. It`s a complex carbohydrate and a very good fibre source. Just add a small half spoonful to her mix each day or as necessary. She will really enjoy them. Just be sure they are plain porridge oats and not flavoured or the microwave types.