The game is so that in each level after each boss the scene changes completely and you learn the mechanics as you play over and over again until you can complete everything in a single pass.
And yes, the idea was to change style in each level to give that feeling of surprise in each one of them.
It has some hidden secrets waiting to be discovered.
I am very glad that you liked it and thank you that you were able to play it and enjoy it. Thank you so much!