As far as following the theme goes, it seems like the only thing potentially connecting this game to the theme is that collecting peanuts makes you bigger, but with no additional effects.
And it seems like getting bigger actually plays counter to the sliding mechanic, Which is not only difficult to perform (especially as you get bigger), but poorly explained to the player.
Graphics mesh well together, it doesn't feel like anything is out of place, audio is good as well if a little spartan (but sometimes less is more).
If you can explain the sliding mechanic better I think this game has potential, but for now it's just too frustrating for me.