IPhone application problem

Hi, I recently got an app called "Colors!" about two weeks ago. Last night, I experienced a little problem, but it wasn't a big deal. To try and fix the bug, I decided to try to delete the app, then re-download it. I payed $5 for this app, and when I deleted it, I openened up the app store on my phone. I searched for the exact name, but it didn't show up. So I went to the website to find a link to the app, but when I tried it numerous times, I got an error message every time. So I go back to the app store to atleast get the lite version of Colors!, and when I tried to download it, I got a message saying " app no longer available ". Why can't I find the app in the store, why can't I download the lite version, and I don't have access to a computer, so how can I resolve this issue without one? Please, I need some help, cuz this is kinda pssing me off lol.