Let’s imagine in my team’s cocos2d-x game there is something we have no idea how to implement. If it safe to allow somebody you meet on the forum to: Access your game via bit-bucket, implement the thing and then return it back to bit-bucket?
Thank you.
It’s up to you.
But:
Do you scare if someone will copy your sources, media and maybe something else?
Probably someone can publish clone of your game very quickly 
Do you have some private info that should not be accessible to third party persons?
No. It’s just a small basic game for a competition but I’m having trouble making a slingshot. (via box-2D)
In this case don’t worry and give access to people who want help you.