Uh, it's Tetris.
It's Tetris. With the blocks rotating the wrong way. There's already a flash Tetris out there, with much nicer graphics. And the fact that you called it "Gelly Tetris" instead of just "Tetris" led people to believe there was some sort of twist on it. That's just rude.
I was going to give you a four for the effort, but then I noticed there was no mute button anywhere. I always dock points if developers forget to put in a mute button, but because this is such a simple game it'll earn you a zero.