I have to agree..
The use of blaring instruments at the start leaves much to be desired. The song itself is quite recognizable though. The piano is pretty neat, though there are a few points where it sounds slightly off key, especially at points where you're pressing two keys repeatedly. The beat is a little redundant, but forgivably so; tetris doesn't exactly give you much to work with. At 2:18 to 3:22 you nail the piano. The ending kinda leaves the song hanging though...
Altogether, mmh. The best synopsis I can give is a missmatch of good elements. However, you state most of your errors in your comments. I needn't rail over them again. Interesting rendition.