You should upload a free demo and a quick video of some gameplay so people know what they are buying. I personally wouldn't risk $2 on a game that I haven't seen a video of or played a demo of. Bonus points if the demo is playable in the browser on the game page, so you don't have to even download it.
I am also attempting to get my puzzle game some more attention, after over 130 views and no downloads, and only 4 downloads of the demo. I'm up for making a bundle with you, too - with just about anyone reading this!