Control scheme can make the game unplayable depending on the keyboard of the player (older keyboards limit the number of keys that can be pressed at the same time). Music is too loud (with no volume slider) and seems to be the only audio there is.
Thanks for your feedback. Actually 3 key(Max) will work at a time. So, that won’t be a problem hopefully. As there is only one BGM, computer's sound controlling system will be enough. I will keep them in mind.