Ah that sounds like your save file got corrupted. Go to Appdata\Local\AtC_BB\Saved\SaveGames folder and delete the .sav file. Next time you boot up the game, it should create a fresh save file and solve the issue. If you don't know how to get to your appdata folder, type %appdata% in your search bar and it should pop it up.
Viewing post in Around the Clock at Bikini Bottom comments
Oh dang, that's very odd. When you would click newgame, would nothing happen and the continue button would take you to the map screen but nothing there would work, correct? Or was it the game just wasn't working or crashing? I can only suggest uninstalling and reinstalling the game and if that doesn't work, I'm not quite sure what else could be causing your issue besides a corrupted save file. I'm so sorry I can't be of much help!