Don't worry. Just to show that you can use your imagination, can write semi-decently and that you can interact with NPC (non-player characters) a little without making them go too far out of character. If you've ever written a story, it probably won't be at all difficult for you.
I saw your RP and it looks really good. If I may inquire though for someone who has never attempt to Role Play before, what are you looking for in a RP sample? Like I know the basic fundamentals like spelling and grammar, but is there anything specific?