well guys, i just read that tutotrial on gas13's site (yep, in russian, piece of cake =) and the thing here is that matriax' water texture is a 6-color-one that was done by hand - your water looks like you cut some corners by using a 'machine-made' noise.. and judging from the palette: it is a machine-made noise
proof: the slots with the water's colors in the palette are totally unsorted and have lots of slots with nearly equal rgb-values (example: 133-192-199; 135-193-200; 133-190-197)..
despite that: i don't think that nearly 1:1 copies of tutorials belong here (read: only submit your own original work)
but water won't go perfectly square if overfull, try this with your bathtub, I guarantee it won't look like that.
well the blocks are easy enough to do... but I'm a bit against using a transparent layer for water... and the water coming over the bricks looks odd.
EDIT: the water texture could have used a noise filter, or random pixels sprayed... but It looks more deliberate than random.
pixel art implies that (more or less) every pixel is placed by hand - and thi is in no way the case with this water-texture!