I'm pretty sure that some gambling site's (in particular with the crash game) source code can be found online for free, but I can't find one ... can you give me a hand?
if you know any forum where they are present or some site, can you send me the link?
thanks
You will most likely not find something as specific as a crash game. The closest thing you can come across to a crash game is the script without any backend or fronted but the basic logic how the game would work. You'll have to code everything else yourself.
An Alternative - Find a casino provider that supports the crash game and license it. You'll pay some fees for it but can avoid the hassle of coding all of it yourself.