One of the best games I tested so far. Nice concept, nice execution, nice art.
Animations have a really rewarding feeling, love the dagger throw and teleport flow.
If I may, I'd suggest a 'recall dagger' key (which could be abused, maybe not optimal) or at least a dagger respawn when lost. Lost my dagger once in spikes, and disappeared once. Forced to restart.
The soundtrack volume could use a few percents increase.
Movement feels a bit sluggish as well. More on this : Why Does Celeste Feel So Good to Play? | Game Maker's Toolkit
And finally, it would make your game more accessible for AZERTY players with an alternate key for teleport. Since the layout is ZQSD instead of WASD, I was forced to use the arrows and enter with my right hand, which was not optimal. (maybe left shift ?)
But... you're game is great. It has Celeste / End is Nigh potential. I'd buy a complete version of it without hesitation.
p.s.: again, love your animations — feels awesome.