You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

platformer
1.0-dev

This version was deleted from PyPI around 2024-02-13. Installing fails with:
$ pip3 install platformer==1.0-dev ERROR: Could not find a version that satisfies the requirement platformer==1.0-dev
View other deleted versions of platformer

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2024-02-12/ \ platformer==1.0-dev
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
platformer-1.0-dev.tar.gz (18.2KB)