The notice only made him push up this change to an earlier date. The source code was made available via GitHub under GPL 2.0 or later and the game's assets under the CC BY-SA 4.0 license.
The announcement caused him to expedite this modification to an earlier stage. The source code was shared via GitHub under GPL 2.0 or later, and the game's assets were released under the CC BY-SA 4.0 license.