As many of you were quick to point out, the previous game, Four Second Fury, has been around a few months—since April of this year, to be precise—and a sequel to that game has just been released, called Four Second Frenzy. While both games feature the same fast-paced action and gameplay, the sequel offers even more mini-games than the original (50 total).
The concept is simple: using only the arrow keys and space bar, follow the on-screen instructions for each mini-game that gets thrown at you ("Avoid!", "Shoot!", "Swat five", etc.) And you have just four (4) seconds to do it in. Make it through 20 mini-games before losing all seven (7) lives to win.
The game will be immediately familiar to anyone that has played Nintendo's Wario Ware series of games, as it borrows the very same frenetic gameplay formula. The result is a game that is almost as enjoyable as Nintendo's commercial offerings, and that's saying quite a lot. This game is a lot of fun!
The larger sequel was made possible by a collaboration of 26 Flash game authors from all over the world. Together they have made Four Second Frenzy an even better game than the original ("Fury") due to the sheer variety of mini-games it offers, and by including three (3) different modes of play: Normal, Endurance, and Sudden Death.
Normal mode is the same as in Fury, except you get seven lives to beat 20 games; Endurance mode gives you ten lives to make it through all 50 mini-games; and Sudden Death challenges you to make it through as many games as you can without losing a single life.
A cheap (it's free!) alternative to commercial games offering similar gameplay, Four Second Frenzy provides all the frenzy you'll need for an enjoyable browser-based game play experience.
If you need help with any of the games, there is a tutorial available that gives hints for each of the mini-games included in the game.
Check out the entire Four Second series of games.
Cheers to Jibioko, Camjam80, RedKlonoa, and Mike for suggesting this one.