Teleport Player with a command block don't work

[trungus]

2- There is any way I can help with the C++ development?

You can take a look at the GitHub.  Probably beginning with GETTING-STARTED.md

HI Peterbell10,

I follow your advice and I read all the documents and I have one questions,

right now, do you really merge the PR ? ... as I can read here, you are a bit overwhelmed, don't misunderstand me, I really know the feeling of a small team does a lot of work, I really want to help, please feel free to use me.

I can help with C++, with PR review or with everything you need, I have not a lot of free time, but almost every day I do something with cuberite.