I enjoyed this. i think its a fun game that could be improved a lot if you wanted to continue developing it. Overall I agree with other feedback that combat felt a little clunky. I think the feedback I would give is this.
- Enemies are a little fast
- Controls are a little floaty/clunky which makes fighting the enemies harder.
- Navigating the dungeon while spinning the obstacles, while fighting enemies while spinning the sword was a bit disorienting. I would say you should make the dungeon a bit bigger in order to make moving around and fighting the enemies a bit easier and then maybe have large rooms designated for enemies. (Kind of like how in games like Binding of Isaac the enemies are inside of rooms and then when you clear the room you're free to walk around)
- I would also say the sword should have a separate button for spinning it, that way you can swing the sword without the level rotating.
- You might want to separate the games mechanics between combat and puzzle solving/rotating the level. Some sections and rooms are about combat, other sections are about navigating the spinning platform, getting the keys etc.