Since Braid hit it big in 2008, puzzle platformers have been indie bread and butter. Manipulation of physics concepts like time and gravity has become relatively common in the genre. Constant C takes those ideas a half step further, by combining them.
In the end, it works. Though gravity control is nothing new, the combination of it with the frozen time mechanic allows for situations that have not been seen before. Some of these situations come up more often than they need to, but the journey stays interesting enough to see it through to the end in Constant C.