1. Very unique concept. Positively love this.
2. I was definitely stumped on some of the easier levels like 18 or so. Every group of 10 puzzles: there's usually 2 that I struggled on.
3. There are 100 levels, which is ideal. Why don't other puzzle app developers realize this?
4. At the moment I've done 72 levels.
Other Puzzle Apps with a Hedgehog or a Mole (cousins to Hedgehogs)
Patchmania Not exactly sure if the green character is a hedgehog.
Mechanical puzzle known as The Hedgehog
This is a rolling cubic maze known as Intelligent Hedgehog by Oskar van Deventer. I own one of the original versions made for the IPP. At that time it was called Moon Rover (I think). In this puzzle, the hedgehog has some room to pass over rocks and still get to the exit.