The sound for all buttons for creating units and the menu sounds are the same heavy bass sound. Please consider changing this to something else. I am not sure if others are finding this hard, but I end up getting a headache with this sound anytime I play the game. I have to lower my sound volume as low as possible and this affects other game play sounds like attacking.
The original game had a nice short clicky sound which is way more easier for the ears. Please bring that back