Yeah, I have noticed it too :D
I wanted to add some SFX and footsteps, but we had no time :/ I wanted to add our own music to levels too, but I only had time to add it to the main menu because our tester found out fatal error hour before deadline so I needed to fix that :/ Anyway in the next patch I will add more SFX and music :D Btw. Thank you for your comment :)