not bad ... but room for improvements
1) The menu: In the sub menus the design is a little bit more to the left than to the right. Try centering it or align it to the left (but with this design I would center it).
2) The Searchbox: I would try to make them the same size as the main menu options. But that means, you will have to play around a bit with the sizes (Standart Box is bigger than Standart Button, than again, you don't use standart there).
3) The images on the welcome page could do with a bit of padding towards the text side. Set a margin or padding to the right, top and bottom side of the image if the image is on the left and if the image is on the right, do the same, just the padding left instead of right.
but, keep on, it looks promising already!