I've just played the first two packs. I wish there was something positive I could say about them. Sorry, but they are just too simple and uncreative. Half the levels in the first pack can be completed with using builders alone, and all of the remakes are easier than their originals. Seriously, what's the point in remaking 'Just Dig' with the same solution but more skills? O_o
Also, while it's okay to use levels from the original game as templates, it's polite to ask permission to use levels of fans in such a way.