After watching some of my friends and classmates playing,
I noticed that most of the players will exploit the ability to alter the orientation of the world so as to move the character without actually moving left / right.
I decided to fix that by restricting the player to only rotate once after the character has left the ground (in the air), so each rotation will be more important and have to be well-considered before being executed. It turns out to be a good decision, and the game feels more like a puzzle game.
In order to teach the player how to utilize it, I have created a few more easy levels to teach players (and force them) to use the controlling technique I want them to acquire. Therefore, there aren't many "actual" challenging levels (at least in a developer's perspective : D) right now.

Besides that, I also added a UI prompt when a player died too many times due to pressing the wrong rotation button (i.e. want to rotate clock-wise but pressing the one that rotates counter clock-wise). I shamelessly took the reference from Constant C : D

I hope it will help the players to get used to the control more. 

At last, I also added some new elements in games - button, box and jumping gem. Although I haven't added many new levels with those elements yet.