I had the thought before of how you might get web Zeta and ZZT to communicate with the webpage surrounding it, and was really excited to see that somebody finally did, and with a lot more crossing mediums than I'd have imagined such a game to have. Had it just been the flies alone, I'd be impressed, but more and more kept happening, and the game really captured the chaos and stress of trying to get things out of a state of disrepair.
This is a really strong starting point for a first Oktrollberfest. I feel like you captured the spirit of a trollgame without making it miserable to experience. (Except for me not thinking to just pause the music video.)