Yay, I finally did it!
How? Mostly by learning when exactly The Bug occurs, and managing to avoid it until getting around 5000 points. This allowed me to build a "double spiral" fort, with an essential door in the middle, that you can use to fool all troops except wizards, to let them run endlessly back and forth. Also, placing some doors at key positions allows for "harvest runs", since colon collectors don't go fast enough to achieve crazy high scores.
In the end, when it dipped below 1 FPS, I decided to end it during a wizard wave, but I think I could have played forever with this strategy... This game is awesome, but the end game still needs to be fixed!
