This is a great puzzle!!!
I hadn't played the puzzle that you based on before, and I found your puzzle really nice. The gameplay is smooth, very responsive, and I really liked how you managed to change the wheels only with the keyboard.
The puzzles are great, there are a lot of different obstacles and challenges. I didn't play all the stages, but I would come back to play again and continue where I stopped.
The time in the stages are very good. I could play calmly through the stages, and there were plenty of time left. When I lost in some, the next try was easier to complete and the time wasn't a problem.
The graphics are very nice, and the sounds matched very well with the game.
The menus and the tutorials were very explicative. I didn't have difficulty reading them and learning about the game.
I had some problems in the beggining trying to understand what the Z and X button does. But when I understood, I found it amazing.
The game is very catchy, and I would look into it if it goes in some platform. I think that this game has a great potential as a casual puzzle. I usually play on PC, but I think that this game will fit greatly in mobile devices: the touch system of it would help a lot in rotating the wheels and releasing the marbles, allowing to do it faster and being more comfortable.
I only felt that the marbles moves too fast, mainly because I played in the keyboard. I think it could move slower, to understand and react better for what is happening. Perhaps there could have an option to increase the speed, so the marbles velocity and also the time decreasing velocity would be relative to it. If I play again in a stage and I'm already very familiar with it, I would increase the velocity.
It's a really great game, congratulations for the entry!!!