This is a really neat concept, but it's a bit too difficult. The problem is that the bosses don't seem to telegraph what combos they're doing and it's a bit too fast to react (at least for me). I would suggest increasing the wind up and maybe adding some special animations at the beginning of the combo like with the one triple lane slash. But overall, cool concept and has a lot of potential.
Viewing post in Moongrail jam comments
Oh yea the telegraphing is kind of mid in the game. Each animation frame took very roughly 30 minutes to make, so when it came to that, time was simply running out. The telegraphing could actually be worse, currently each move for each phase has a different starting frame (within that phase) just to make it ever so slightly more possible. But yea, if I was to remake this, I’d do it with lower res pixel art and each pattern would get its own feel, just like you are asking for. That would probably make the game a lot more playable.