Is it possible to steal a source code?

Is it possible to steal a source code just from the creator hosting the game? If so, is there a way to stop it from happening? Because some guy came in, said lol! hax0r! and left. I'm alittle concerned, his name was Dhakkon.

Anyways maybe i'm just over-reacting. But i spent about 5 months on the code and I don't want it stolen.

Hey, can any Progrider tell me what it says about Mentifex AI?

The following link claims that my browser is "too old" to use:

https://forum.fractalfuture.net/t/what-i-have-learnt-from-a-failed-kickstarter-project-in-artificial-intelligence/753/18