I've since added an updated version post jam deadline with a smaller file size and shapes now stop rotating when on the ground, check out my itch.io page for the update.
Note: there's now an executable version of the game made with pyinstaller. The remaining code and assets are the same as the previous submission, just unzip it and run RotateShape.zip with the music and images assets and file hierarchy intact.
Pretty good idea, but it needs a warning about photosensitivity triggers that appear near the end of the game on when the game starts and on the download page.