Only level 10 yet to beat. I am a big fan of the difficulty spike there, the opposite would have been a bit disappointing.
Anything with bugs is worthy of interest anyway but the game is super fun, I love it. The 10 levels are very distinct, make very good use of the color swapping mechanics, and they're all super fun to solve. The difficulty among the game is perfect.
Super cool entry, I've a lot of fun playing it.