Btw, if you like Rush Hour, I highly recommend Antivirus (terrible name for Googling) by Smart Games [1]. The pieces come in 9 distinct shapes along with 2 wall pieces, which give most puzzles a unique character. Computational investigation shows that the hardest possible puzzle requires over 200 moves to solve. Beyond that, the game looks and feels fantastic [2].

[1] http://www.smartgames.eu/en/smartgames/anti-virus-classic

[2] https://www.youtube.com/watch?v=71CWtqH-csM