Oh, this is the computer version of Rush Hour, isn't it? I've got the physical version and a couple of expansions. Original 40 were not too hard (don't remember finding no. 40 particularly difficult, but a couple of the others stumped me for a while). The expansion packs have some extra-hard levels though; haven't got round to doing them all yet.
Games and Puzzles have a number of (non-computerised) games of this type; they seem very popular.
I wonder if an extra-hard level really is; a useful angle of attack on some of the ones other people found hard - as with some "hard" Sokoban levels - is to notice that only one move does anything useful at all, rinse, and repeat.
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Games and Puzzles have a number of (non-computerised) games of this type; they seem very popular.
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