I just had time and played it. It's really good! The difficulty curve feels good, from a little too easy at the start, to very challenging in the end. I did feel that level 7 was a little more difficult than 8, but meh. Thumbs up!
Thanks for playing! I can see how 7 is a bit more difficult than 8, but for now I'll leave it as is, as I heard someone got stuck on level 8 specifically :P