Some thoughts:
Citra hops aren't particularly citrusy, more tropical-fruity. There may be better options (Centennial, Amarillo, etc.) but I think a Citra cream ale sounds nice.
Additions before roughly 15 minutes aren't a very efficient use of (expensive) flavor/aroma hops. I'd use something cheaper for your 60 minute addition and move the 30 min to 15. That would also let you use the full ounce late - assuming this is a ~5 gal batch 1/4 oz may not be very noticeable.