Sixty Four achievements

Get some Celestial Foam

Get a Hollow Stone

Get a Hell Gem within the first 64 minutes from the start

Get 64 000 000 stones

Honk 64 times for no reason

Put two silos together

Click a cube 6400 times

Find a Chromalit

Find a Hell gem

Get Beta-Pylene

Destroy 64 machines

Build 64 machines