To anyone reading this, this game stopped working long before Flashpocolypse. I just ran it in Ruffle in hopes it would bypass whatever glitched in Flash, but it doesn't.
For the record, this game is actually a demo and the full version is on Steam, though I would suggest checking to make sure it doesn't have the glitch too before buying.
If you really want to see the demo, I have heard some flash games that have been broken for years work in Bluemaxima's Flashpoint, so if you have Flashpoint, you could try it there, else find a walkthrough on YouTube.
P.S. I did play the game once way back when and to my minimal recollection, it was decent. I might have had to check the walkthrough a couple times, but that's not uncommon when I play a complex point-and-click-game.