Lumines

Lumines is puzzle game developed by Q Entertainment. It was published for PlayStation Portable (PSP) by Bandai in Japan and internationally by Ubisoft.

Lumines resembles Tetris on first impression, and it's similarly intuitive to pick up and play, the simple design belies tremendous depth. Squares comprising four smaller blocks, which can be one of two colors, fall from the top of the screen.

The objective is to form solid-colored rectangles of at least two-by-two blocks by rotating and arranging the falling squares properly. Solid rectangles instantly light up and get cleared away as a line (called the "timeline") intermittently passes from left to right across the screen, kind of like a windshield wiper and just like a timeline in a music sequencer program. 

Clearing blocks in this fashion is how you earn points and also how you prevent blocks from stacking all the way up to the top of the screen, your game ends if the blocks stack too high. Meanwhile, any blocks above the blocks you just cleared automatically drop down until they hit other blocks or the bottom of the screen, and this creates the potential for some big combos. 

Controls are tight and responsive. Despite having so much horizontal space to work with thanks to the PSP's landscape-style screen, you can just as easily fling a square all the way from one side of the playing field to the other as you can nudge it just a hair's breadth into the perfect spot. 

The key factor to Lumines is the music. How you play affects how the music plays. If you pull off a particularly good move, a new beat will be added to the music. Also, as you last longer in each game you will move into new songs so the aim of the game really is to survive as long as possible to unlock new items to play with