PunyInform v2.4 is out! 

https://github.com/johanberntsson/PunyInform/releases 

If you want to stick with v2.3 for your jam entry, do so! If you want to upgrade to v2.4, make sure you read the release notes first. In particular, there's a section for things in the new release which may force you to make changes to your code as you upgrade, just to keep your game working the same.