You are tight, that sound does get annoying. Like your idea on a script to control it (and I will lower the volume on it).
I had wanted to do walls (inspired for AOE) but ran out of time. Also the complexities of building them in lines around corners etc. Also the giants are so big they could just step over them!
I'd like to continue it and work on a bit longer post jam, just not sure if it would be of interest to many people long term as I guess it's a fairly short game in terms of each game time.
Thanks for giving it a go.