For me it's definitely hard to read, especially since the font is so narrow. Don't forget that the primary "game mechanic" in a visual novel is to read text. A well readable font and size of it is even more important. Another idea might be a font-size setting (Where you have to check whether everything is visible or can be scrolled into visibility with the biggest select-able font size ).
To further improve readability I would prefer the background monochrome or only slightly textured. How about to placing the text inside a single big cloud?