Why the textures look like this?

no image, please use a link or something

the link doesn't work. you probably set your dropbox to private or something. you can use https://imgur.com/ to post images.

 you used .png texture to make the blocks?

well check if your textures don't have mising pixels

 for exemple my profile image is a .png image and if i use it into a mod it will look exactly the same as the texture of your blocks

*the