The first Gravity Guy starred a hero wrongfully imprisoned by his evil government for manipulating gravity. He broke out of prison, only to be endlessly pursued by a heartless Gravity Trooper. At the end of the game, Gravity Guy escapes to his freedom.
Gravity Guy 2 disappoints ever so slightly by comparison because all pretense of story is gone. Players control a now-helmetless Gravity Guy, but the cut scene bookends and evil pursuer have vanished. The store description says Guy has been captured and cloned (Miniclip also published this webpage to expand on the premise), but that doesn’t spill over into the game itself.
In fact, the first game’s story mode and local multiplayer are MIA as well. An endless runner doesn’t need these things to keep players entertained, but the lack of context and modes still represents a small step back in an otherwise much improved game. Still! Forget the missing bits, this one really is much better.