Outstanding pixel art and some of the best music i've heard in my life, but the gameplay doesn't introduce enough creativity to stop it from getting repetitive.
Edit: just completed the game so i want to bitch about it a little: The core physics are copied over wholesale from Celeste, so people who are familiar with that will feel at home here, but sadly the meticulous playtesting and design of Celeste were not carried over as well. Most of the levels are at least tolerable if you're just trying to get to the goal, but the game puts really heavy emphasis on speedrunning and 100%ing the levels (1/5th of the game is locked off unless you 100% the first 4/5ths), and if you actually try to do these, the fact that the level design is about on par with games i made on scratch when i was 13 becomes more clear. Since there aren't any actual new level hazards introduced besides the basic spikes and sawblades, the levels have to rely on repeating the same 0.5-second challenge fifteen times per stage, and the worlds the game is divided into become purely cosmetic. About half the levels could have been completely removed from the game and it really would have been a net positive.