iPod video 5th generation plays music, but frozen screen

I dropped my ipod on a cement floor. When it hit the floor, the music stopped playing but the album art stayed on the screen. I shut off the ipod manually and I was not able to turn it back on. I left it alone for several weeks. Then I plugged it into my computer and it started charging (when I first plugged it in it was very low charge). It eventually showed up in itunes. After it was charged, I unplugged it from the computer and it seemed to work fine. I selected a song to play using the click wheel. The song started to play. Then the click wheel and button stopped working and the screen froze. The album art remained on the screen but I couldn't turn down the volume, etc. When the song was over the ipod stopped playing but the album art remained on screen. I manually turned off ipod. Suggestions please?