Thank you for the feedback and for the the bug report. Sorry for the crash. Looks like that could happen if an enemy is killed on the same frame they destroy a building, or something like that. Filed away here: https://github.com/rparrett/entytd/issues/5
I think the music is probably just too loud overall, but having default settings not 100% seems like a great idea for a browser game, especially. Thanks for the tip. I agree that it's on the chill side. That's definitely what I was going for, but your feedback makes sense.