I felt the story wasn't particularly well told
I kinda like the way you used gradients fading out the white, to help make it all 'dreamlike'.
The plot was really odd. Kinda funny.
I liked the flashing colours when the blocks disappeared.
I don't like the way you draw your characters. Not just because of the lack of detail and the shapes of the legs, which I find aesthetically unappealling, but also because at times I felt the 'acting' wasn't great and I wasn't sure what was going through the character's head.
Like, after he shields his eyes from the light, is he surprised? In awe? Maybe stretch his eyes a bit!
The whole notion of this guy 'winning' at tetris in 1-player mode, kinda annoyed me, as did the way his move in the arcade didn't clear any lines.
Also, why have an auto-start? As far as I'm concerned, auto-starts are just an unnecessary inconvenience.
Maybe if you'd added stuff like having loads of folk around the world queueing up to play him, maybe he goes on TV or something, maybe loads of folk stare in awe... there's a lot more you could do if you incorporated reaction shots.
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Interesting story, nice use of white, but I felt the story wasn't particularly well told.