- Half of your CV is empty space
- Dates are formatted really badly, no one would be able to get a good grasp on your project and work timeline quickly
- You have a game project that spans several years, and you sum it up into one sentence. Why are you doing that? It's one of your main selling points, and you don't expand enough on it.
- The prioritization is not sound. I'm reading about your proficiency with vim (pretty much irrelevant) before I even know your work history.
- You mention Linux administration. That's pretty broad. You should specify more. Did you deal with network config? systemd? FUSE?
Overall your resume looks lackluster, unprofessional and bare-minimum. It's been more than 7 years now, and you still see nothing wrong with it? Sorry if that sounds harsh, but I'm doing you a favor by giving you a reality check.