Project is here https://jssocial.pw/app/3dspread2
Source is here https://jssocial.pw/u/3dspread2

Range references are now possible simply by having one address next to another.

Example:
=sum(c0:0:0c3:3:0)

Not using a function will just return an array of its values and store it in the cell.

If in c1:0:0 you have =c0:0:0c0:1:0
and in c2:0:0 you have =c1:0:0[0]
it will result in the value of c0:0:0

You can also determine if a value exists in a range with:
=(new Set(c0:0:0c3:3:0)).has('value')