Oh, what a beautiful cat! It’s not purebred is it? Mine usually don’t play anymore once they’re around 10 months old :-( But then they’re outdoors and get a lot of stimulation; this might be the reason why.
A new thing I’ve introduced is that I have a box of catmints (with no sugar!) beside my bed. Every morning a get some furball attention recently because of that - it usually lasts until they’ve got two treats ...—M.C.