doesn't seem to work for me after the "it's a me" title screen, R does reset, f2 does go back to main menu, but the screen only has background and no obstacles/character, looking at a YouTube video of the game, this doesn't seem like intentional behaiviour upon first launch
This sounds like an issue where the game fails to read the level files. Make sure that the ZIP file is extracted to a folder without restrictions about file reading and that all the files in the ZIP make it into the destination folder (for testing purposes, extracting the files e.g. into a folder on the desktop should work)