Hi. What you did really well is keep the game understandable even when there's tons of stuff going on the player can't see. It does however mean that after level two all levels started feeling the same, this is also partly because I thought the levels were pretty hard and took long to beat. Maybe you could've made rotating mandatory and introduced it after level 6.
The rotating mechanic was really cool. The way rotating it a little bit gave you extra to time to react when your current platform was disappearing was a bit of an aha moment.
Currently I feel the controls are a bit too hard for how long a level takes to beat holding down one button. I kept getting almost to the end, then dying, and then having to sit there and hold the x or z button for 10 seconds again. The way I'd change this is by making the platforming simpler, and then making it so releasing x or z continues to move it in that direction until you hit the other button. In other words, it can't sit still. Now make a grace period for how long you can't change the direction, and you get a much more hectic hard than precision hard. If you then also make the speed of the z slider go up, that'd be great. You could of course merge both buttons to one button and make it start going automatically at the start of a level.
While writing this I'm really noticing how much of a bummer it is that the music keeps resetting when you die or beat a level. It's really good, bro.