itch.io

The parallel with spatial psycho technique tests was so obvious I thought your work was a direct reference to them at first... Cause adding and subtracting basic shapes like that is a classic in space monkey intelligence testing. TBH, I already pass some lame ass tests way easier than your game ! 
Ok, so if it's touch screen compatible, I understand the lack of preview. Now having that in mind you could also detect if the user is on a smartphone or on desktop, if... the code can handle it...
I know music can look hard and impenetrable for many coder, but at the end, music is "just" audible math : frequencies, harmonics and interval, thats it. I even think its the most mathematical art form around here. Tell yourself that there is even subtractive and additive way of making sound too ! (with FM synthesis i.e) Also throwing a pre made looping tracks into a project should not be that hard for you I think.

So we will see next year, maybe... 👀