Release under libre license
Please may the project be released under a libre license? Some OS distributions such as Parabola cannot package games which are not libre.
It is literally GPLv3
Many files have no copyright notices, and there is no license file in the root of the repo.
Many files have no copyright notices
AFAIK GPL3 does not require this
there is no license file in the root of the repo
There is candybox2_sourceCodeLicense.txt
Whoops! I missed it because it wasn't called something standardised like COPYING.txt or LICENSE.txt.
As far as the license headers in each file goes, it's not a requirement, but it's clear documentation in case a file becomes separated from the repo.