I think the ignoring it goes hand in glove with increasing the other suggestions @Adge .....
Cats love boxes and bags ..... you could construct temporary jungle-gyms for her by leaving a pile of different sized boxes in a heap on the floor, with any paper bags you can find (our cat used to hop into the paper shopping bags as my Mum emptied them out ..... when she went to pick up the “empty” bag it weighed like a cat).
Poke something rattley like cat biscuits inside a tin and replace the lid, so it rolls around the floor sounding intriguing ......
Take a container with a lid and fill it with everyday household things like a peg, a sink plug, a plastic teaspoon, a piece of cord or string, a bottle or screw-top jar lid, a screwed up piece of paper, a feather (if you are happy for her to play with one), dried leaves that crackle and tear ..... and leave it on the floor with the lid ajar enough to be a challenge.
Spend time patting her and playing one-to-one with a tease-toy.
If you can acquire or build “cat furniture” and give her her own corner, that would be good too. You can look up thrifty ideas on the Internet.
