Great point Molly re: chasing a toy down the hall. I have a short hall, but she still loves to chase the toys down & bring them back!
I also made a toy for her - one sock stuffed with 3-4 socks & tied off & she loves to play with it on the bed! I play tug of war with her, let go & she shakes it as she would if in the wild trying to finish off her prey ! We play for 20-30 minutes at a time on the bed. I also get off the bed & crouch down, sneak from side to side & she gets very animated & starts to bark. I can rough her up a little with my bare hand & she never bites down hard, but I added a dimension I used to do with one of our dogs many years ago, I put on an old glove & it's like my friends training their Shepherd or Malinois for police work, she recognizes it & bites, still not hard but she has a ball!