I would like to know, when i make a game in scratch, if i could make it a ‘real’ game outside of scratch (in a different engine).
And I would like to know if there are any problems, like licensing, or other stuff.

I'm fairly sure any game made using Scratch is under CC BY-SA 2.0, someone correct me if I'm wrong. So yes, you can.

chenzero1five wrote:

I'm fairly sure any game made using Scratch is under CC BY-SA 2.0, someone correct me if I'm wrong. So yes, you can.

yea you're right, all scratch games fall under CC BY-SA 2.0

Scratch Terms of Use wrote:

4.3 All user-generated content you submit to Scratch is licensed to and through Scratch under the Creative Commons Attribution-ShareAlike 2.0 license. This allows others to view and remix your content. This license also allows the Scratch Team to display, distribute, and reproduce your content on the Scratch website, through social media channels, and elsewhere. If you do not want to license your content under this license, then do not share it on Scratch.