Mino, I liked the game a lot.
Because it had multiplayer over internet unlike EA Tetris (and most of iphone games). It had few alternative ways to control the game unlike EA Tetris (which is important on device with limited controls capabilities like iphone). It had online leaderboards unlike EA Tetris. It had well made chat features that i found unique on iOS platform.
This is absurd that while game rules are not copyrightable, making game with same rules would allow competitor to fight you. Imagine lawsuit form chess maker against other chess maker, that would say:
-chessboard is 10x10
-there is exactly same set of pieces
Well yes, it is, because it is how chess works, and it is how it is played. Sure you can come up with infinite number of rules, but's that not the point of chess.
so when at this list of items that they claim are infringing, one part of them are essential rules of the game and other part are things very generic that are not unique to tetris (i.e. features common among many other games).
Sure we have copyright law, but don't forget we also have antitrust law
On side note I wonder what tetris corp and its lawyers have to say about Feevo
and it's similarity to Bejeweled.