An impressive amount of level you have. I couldn't play them all as I don't have a mouse and so level 2 - 3 was very impractical. I think the cat looks pretty cool but in an environment where everything is just one color it stands out a bit. When making art for a game the most important thing to focus on in my opinion is coherence. The levels were quite simple, but enjoyable and had some interesting stringing of different elements. Well done!