I think the core concept is actually really cool the ninja style and the boss were fun and interesting.There are some areas that could be improved, like the font (it would fit better if it matched the game’s style more) and the UI feels a bit inconsistent. Also, for sprites and animations, it might help to use references or 2D animation examples. It’s usually better not to stretch pixel art, and instead keep everything in the same resolution and pixel scale.But that’s just my opinion. Your game is definitely good I spent quite a while playing it. I’m still a beginner myself, so I also have a lot to learn.