I actually messed around with that for a while. My idea was to have the bug sounds be a sawtooth wave and the bat be a sine wave but it was very difficult because the sawtooth wave has a whole bunch of harmonics so the bugs were really hard to find. Basically the pitches matched a little bit in several places instead of just one. This is definitely something that I would like to adjust in a full version of this game though. Thanks for playing it!