Hey, I found the concept interesting, however I was a bit frustrated with the way you have to play.
In the first level, I thought I had broken the piece with the blue brick (right at the beginning), only to find out that does not work. At first I though it was a bug, but after further thinking, I realised you could climb up the level and walk on clouds. I think you should better tell players what works or does not, cause I was playing thinking it was not the intedend way.
In addition, the game needs some polish like music and sound effects, to create better game feel and engagement
PS: I didn't find the secret animation :(