Seems like the creator doesn't have much of an idea on where to take this game. If I may pitch an idea, maybe have the next game have 'transforming' shapes, where the puzzle starts with a decipherable shape, and must be folded to make a new shape. That's just my idea, though.
Things to fix: Stop the timer during chain combos. Although miniscule, those extra microseconds can save a 3 star game from being impossible, like Level 13, which is far too difficult with the time given. Also, fix where the bombs are made, because if a bomb would be made where a chained block would be destroyed, the block stays and the bomb is never made. Also it makes no sense for dynamite, mines, and nukes to never destroy more than one tier of rock close to the center of the explosion. Finally, a custom level feature would be nice.
What you did do right, however, was the ability to set off bombs without having to switch them. Takes a lot of weight off of planning where to set them off.
 "Shape Fold 2"){kind=icon}
 "Shape Matcher 2"){kind=icon}