I'm having trouble finding a solution that doesn't go through buildings, sadly. I think this is such an amazing idea for a game though--building complex waveforms as a sum of simple individual waveforms is very interesting. I think making this more of a puzzle where several different waveforms are available to be summed into a path, and time doesn't progress until you "commit" to a path through the space you can see in front of you. Hearing the "solution" as a synthesized tone would be a nice touch on top of that!