Dan Da Dan!

Ok, this I HAD to mention...
Another Japanese nutter freebie game, this one's actually really good fun.
Playing somewhat like a hybrid of Ikaruga meets Mr Driller, DanDaDan! at first looks is a basic shmup. But delve deeper and you'll find this game very unique and original. Controlling your ship, you cruise vertically and have only 1 primary weapon. Your enemies are mainly blocks of different colours, some of which shoot bullets either randomly or when destroyed... The genius bit is that when you destroy a block of a certain colour, any adjacent blocks of the same will be destroyed as well. This makes for some really clever puzzles and VERY frantic game play (if you're ever played any japanese shmup, from gemini wing, to radiant silver gun, and recently the excellent Ikaruga, you'll know what I mean!)
The game is very easy to get in to and has that crucial (just one more go) factor. Being free makes it even more of a delight!
Grab DanDaDan! from here and relive your childhood!
Keys are:
arrows: move ship
Z: primary fire. Hold Z to shoot a spinning disk that can go past indestructible blocks
X: Hyper (fires like a mad-man for a few seconds)

Enjoy this Good-Delicious-Game!