Nice and simple idea which works well.
I found the levels too similar, you could have thrown in some threats (like stuff you don't want to stick to) to spice up the game mechanics.
I liked the music and the sound effects.
You should include a move counter to the gameplay UI if you want playersto optimize it. Showing the move count suddenly at the end of the whole game does not mean much to the player in my own opinion.
I liked the artwork a lot.
Thank you for making this game! I had fun playing it!