Thank you for your feedback. I think you got stuck on level 4 because you didn't know the parry mechanic (look at the controls in the settings menu). Here is a small video that shows how it works (it spoils level 5, though)
Thank you for your feedback. I really appreciate your thoughts on the game. I don't know if you have noticed, but there is a parry mechanic in the game, as illustrated in the video below.