Thanks! We will propably polish the game later and add all the missing sounds for, as you said, walking, and others like opening the door, picking up the items etc. When it comes to difficulty, it was intended to make the game a bit hard to make the player see the death screen with the bits of the story few times, but we could have made some of the levels way to hard, as for example the last level, but we migth adjust the difficulty in the future.