I had a blast playing this. The game has been blessed by having a save/continue system going on, because I had some softlocks but I could restart the game and be gladly put exactly inside the puzzle I was playing. Especially right at the end, because sometimes the game would freeze after falling on the last gauntlet.
I also accidentally got to the "outer" side of the level after traversing the tunnel while crouching, but no biggie, exit/continue came to my rescue again. I noticed it because suddenly there were no lights, only dark corridors haha. I almost thought it was going to become a horror game all of a sudden hehe.
The puzzles were very well made, and the whole thing about throwing your sword and teleporting to it was very satisfying. I had some cool eureka moments (like on the elevator puzzle thing, and the one where you have to climb step by step.
Visuals were pretty interesting, I loved the dripping effect and the floating lamps. Music fit the game perfectly. Overall super nice experience, great job! The game reminds me of first person puzzles like talos principle, but with samurai.