I've played another game that does the same thing, and i have to say this game does it much better, besides the physics that work better here the addition of the fist size increase really makes this work
you can almost string together attacks using the return velocity of the fist growth
i don't really like that the game is timed, it can add some unneeded stress, although it was well implemented so it didn't bother me
my main issue is kind of the same as the other game that did this, the fist mechanic is just a bit awkward and can make for frustrating moments, here specifically enemies can get trapped between you and the fist and sometimes miss enemies entirely