Explorer Official touched on this already, but offer to do the same for other game developers. While game devs are not your target audience they are still a valuable source of feedback, and if you take time out of your day to offer them feedback they will often reciprocate the effort.
If you live in an area where there are game developer meetups (large cities generally), going to them is also a great way to get attention on your game. I've gotten a lot of feedback and attention that way as well.