Where default cube goes - 3D Animation

Only Blender users can undertand...

I was wondering where default cube goes, when it has been deleted... Well, here is my inspiration, i made this animation for fun, using blender 2.92 only, rendered in eevee. Except textFX addon, used for the final title, no other 3rd party addons were used, just particles, physics, procedural maps, compositor nodes, and a lot of cubes!