Few too many levels, especially in the small puzzles. There's only so many variations on a 5x5 grid that I can solve without getting bored. A click-and-drag option to fill in whole rows/spaces would be a nice addition, instead of having to click every individual square. Also, the click-and-drag to see more levels doesn't seem to work for me.
 "Picross Madness"){kind=icon}
 "City of Steam: Arkadia"){kind=icon}
 "Running Fred"){kind=icon}
 "Faultline"){kind=icon}
 "Paladog"){kind=icon}