Holy crap, you guys absolutely nailed the vibe of this game! The music, visuals, and sfx reminded me of playing Katana Zero, which is one of my favorite games, but were also distinctly their own/unique. I'm excited to see what it's like with enemies added back in and I can't wait to use the sword and projectile.
Two notes:
I don't know how to describe where it is, but there seems to be one wall right before a checkpoint that kills you, though it just looks like a normal wall. I was still able to get through the area after a few attempts since I managed to go under the wall without touching it, but some people might stop playing there if they think it's just broken. Message me if you need a better description to find it.
Also, I really like how it started getting a bit harder as the level went on. One specific element that could still be made more difficult would be the falling down diagonally to avoid spikes section, as you could make it do a zig-zag pattern instead of just going down and right.
If you guys update it over time, I'm 100% coming back to try it out again!