Bot Land is a competition where you code AI for robots which fight other peoples' robots. I think anybody who loves competitive coding and strategy games will absolutely love it. For the past few weeks I've sank most of my free time into developing strategies and coding bots. Bot Land was released a month ago after effectively being in beta for 4 years.
The website for the game https://bot.land has some videos and tutorials if you want to try it out. The game can be played entirely in-browser. I'm not affiliated with the developer, I just enjoy the competition and I would love to see more competitors!