I am really liking the music man! And i also find the levels challenging, but not enough, so thats why i will try the hard mode later on....hoping it will also have achievements :)
Easiest hard badge ever...i start a game only when i got 3-4 gold mines in my hand and draw another one on the first hit......Then just spamm units, i did the fresh skeletons....very easy, and just repeat and then you got your hard badge
If your ball looks the same as it is on the picture, try turning it if possible with the road sign to match the same as the one below....if it then doesnt complete....then your ball is wrong
 "Linx"){kind=icon}
 "Multitask 2"){kind=icon}
 "Cardian"){kind=icon}
 "Guy of My Dreams"){kind=icon}
 "Epsilon"){kind=icon}
 "The Codex of Alchemical Engineering"){kind=icon}
 "Factory Balls 2"){kind=icon}