Very basic game, this was. A greater variety of obstacles to test timing would help add variety.
Maybe the "Lives" theme could be expanded on more so that say, every life lost swaps out a random piece of the level for something else. I feel it would have been a better alternative to the very stringent timer that runs down even when I have eight lives left to lose. Controls could also have been more snappy and less lurchy imo; one tap was enough to make the cat take a whole step off of the side of the pipe and lose a life.