Nice puzzle game! Sadly, I got stuck on the level "Spikes & Balls".
I haven't gotten to experience the whole game, but I can say the puzzles, up to where I got stuck, were engaging and gradually increased in complexity/difficulty very well. The art is simple, aesthetically pleasing and cute, but some sprites could be clearer. At first I went through the game completely without reading the signs, because I couldn't tell what they were (and I missed the button prompt in the first level).
Overall a great game though. I like the narrative implementation of the theme (the countdown until the mist closes in), quite interesting.