i like receiving-------->feedback:)

Some feedback i got recently:

1.The space between the lines could increase(bigger cubes)allowing free movement
2.I could either look at laser cutting the shapes/pieces or cutting them on a CNC machine
3.Play area at different levels?
4.laser cutting inticate designs or minimalistic?
5.What if instead of the grooves i had wooden spike-like things so that there wouldn't be any fear of the cubes coming apart if cut too deep(eg:imagine the spikes on the hairbrush on a flat base)