I really like the concept and had fun solving the puzzles! And this game is amazingly polished, great job on that!
I have a minor point on the aspect of using trilateration: I found the solution for most levels to be positioning two of the cubes directly next to each other at a certain spot in the level and then just moving the remaining cube to solve the level, which would rather resemble a ray between two points.
But definitely was having a great time playing your game!