It's certainly not designed by anyone who has the first clue about piano engineering.
The rich sound of a real piano is created by acoustic chorusing, direct acoustic coupling between the various strings, and also by indirect coupling between the bridge, metal frame, and sound board. This works best when the strings are parallel and fairly close together, with some overlap in the bass.
The entire assembly is tuned acoustically to highlight some notes more than others - for example Steinways have a powerful bass but a relatively controlled mid-range which brings out the details of the playing. Other brands make other choices.
The design of the action - the playing feel - is not at all trivial.
And good luck designing practical damper pedals for a spiral piano.
The rich sound of a real piano is created by acoustic chorusing, direct acoustic coupling between the various strings, and also by indirect coupling between the bridge, metal frame, and sound board. This works best when the strings are parallel and fairly close together, with some overlap in the bass.
The entire assembly is tuned acoustically to highlight some notes more than others - for example Steinways have a powerful bass but a relatively controlled mid-range which brings out the details of the playing. Other brands make other choices.
The design of the action - the playing feel - is not at all trivial.
And good luck designing practical damper pedals for a spiral piano.