You have a knack for clever and interestingly worded lines, like "She did manage to shift her colour spectrum down a notch in frustration..." There's definitely a spark of natural talent here.

However, this story feels very unfocused. You have a lot of funny lines in here, but the story ends on a very serious tone, with the protagonist and her universe doomed to a cycle of endless destruction. You need to decide on the mood of the piece and stick to it from start to finish with a story this short, otherwise the reader won't know what to feel and end up feeling not much at all.

I think there's a fair bit of writing that you could trim out of this too, and really strengthen the story. Paragraphs 3-14 are not part of the plotline, just naked exposition. Since you can let us know later that she realizes she's in this giant universe-computer, these could be cut without removing anything vital to the story.

If you can create a consistant mood (personally I think this lends itself toward humor) and tighten the plot, I think you'll have a top-notch story here.

Good luck, and keep writing.