Hi there,
I’ve found a site where you code in a gaming context, and you write AI competitively against others.
https://www.codingame.com/servlet/urlinvite?u=1374052
Beware! Visiting the link above will likely improve your ability to write AI for your games, and improve your programming skill overall, but at the same time will sink a lot of productivity hours… 
+1000 My favorite game since 6 months (and the cause of some my decrease activity on jme3)
If you prefer to give me few points, than to @Pesegato:
https://www.codingame.com/servlet/urlinvite?u=1192837
@Pesegato, nice result for your first contest.
Yeah, on the puyopuyo, I spent a couple minutes and didn’t end well… on the codebusters I actually made more effort 
IMHO, leekwars is not similar. Leewars, like robotcode, is one game with one language.
codingame is a set of puzzles (solo), mutli-player/challenges, periodic contest, clash of code (race of coding)… Where you can use the language like (except for some puzzle). It’s also a good place to see advantages and disadvantages of languages vs others for some context.
I used the site to learn Rust, and it was more funny than with puzzle from project euler or C-99.
On puzzle you can also compare your solution to others and learn a lot.
Also you can share replays
Haha, there goes my evening. This should be an e-sport