With impressions that low it’s really hard to make any conclusions about the CTR. Overall CTR fluctuates a lot depending on where your project is appearing. A game on the homepage is going to have a much lower click through rate just because the traffic to the homepage is untargetted, versus someone who is on your profile page looking at your work who is likely to click on one of your projects.
As for getting more impressions: using wide range of accurate tags, encouraging people to interact with your page (like rate it after they’ve played it), and making a game that people like.
Sorry I don’t have a more specific answer