Naji HTML/CSS are not programming language, are mark up languages, depends what's kind of web developer who does HTML/CSS/JS as interface for users, it's front end developer. If do for server to manage data, output, PHP, etc. it's back end developer, if they do both, it's web developer, being developer is more than programmer.
C2 is good editor to make games in short time, it depends what you're looking to work in companies, if they say they prefer code instead of final product. I suggest you should make your own games to sell your license to game portals.