Johnny Upgrade goes to rescue the world in the upgrades style.... the word is in his name so you can bet on it.
The basic thing is collecting coins. You may get them only in one level but with the time limit and explorative style the tempo and gameplay goes up. The beginning is a bit slow but when you hit the upgrades all gets better. Improve your weapon, speed, jump or strength and other stuff. When you reach the boss and kill the you win.