I love ricochet-like gameplay! I would say the same for the difficulty, it's only about finding the correct mouse angle. Add some movement-based stuff (obstacle, things that will kill you) or maybe some thing like a pool game where you can slice twice so you need to think where you will land for you next slice. Not sure exactly but there is room for improvement. Maybe simply remove the ricochet indicator? or fade it after a few meters (like puzzle bobble)?
Shout out for the feeling of the movement, the slow-mo combined with the small slash effect works well! A great sword sound would sell it 100%.
PS: if you want to try out our puzzle game, you can check it here: https://dzamani.itch.io/the-only-neone