Woah, check it out, it's a video of a prototype ATTiny555 working! You should totally watch it!
This animation isn't programmed-- It's a visual indicator of the 555 circuit running in real time! I coded my own custom output pin functionality so that the ATTiny555 drives Neopixels instead of outputting a binary signal.

This is gold! Nice work. In a lot of ways the ATTiny85 is already a natural successor to the 555 - cheap, rugged, versatile... but your trick is really clever.