Solid entry! I love that it had some story, characters and a whole intro to go with it. Super impressive!
The visuals were very nice, especially the character sprite and its animations. The FX were great too, like the screen transitions, the subtle lighting or the trail after a double jump. Even the big spider boss had some wonderful procedural animation!
I must admit I did not enjoy the SFX quite as much, though. I found most of them grating, especially the repetitive ones like the footsteps or the typewriter effect for the dialog box.
Combat was a bit weird. I never managed to avoid any enemy before finding the sword. And then I thought they had way too much health, so my strategy became pushing them out of platforms and ignoring them. The spider boss attacks were very hard to predict for me and he had so much HP I gave up after dying halfway through (the little spiders that can refill your health completely stopped spawning at some point). It's possible I was a bit unprepared, as I only had the double jump and the sword, no other powerup. Also, at some point my sword wouldn't perform the attack all the way through (like it jammed) but I don't know if it's a mechanic I didn't understand or a bug.
Though my biggest complaint would be the camera. There were a lot of times where I had to jump down but couldn't see where I would land. Having it aiming down a bit more would be, or have a button to peek in some direction, like in Hollow Knight where you can look up or down.
Still, I really enjoyed my time with this game. There's quite a bit of potential there, nice job!