I doesn't make sense why it would be so large though. They really must have use no compression whatsoever. Likely stored full uncompressed bitmaps or something. They really need to learn to code properly. Nothing like that should be more than 8Mbits, tops.
On another note, those icons look like they are ripped from Windows, and look like they ripped some 16 color, and some 256 color ones, making it look really unprofessional.
Third, notice the selected menu is light blue, unselected dark blue. While the selected menu item is dark blue, and the unselected light blue. These people really need to take so UI design courses.