Hi aaronwhite1989,
If this was your first practice CAT, then you did fairly well - even with all of the unanswered questions (the average score on the Official GMAT hovers around 540-550 most years). For future reference though, every question that you do NOT physically answer is 'penalized' and that penalty is WORSE than if you had simply gotten the question wrong. This is meant to say that you really MUST make sure to answer every question when you take the Official GMAT.
Unfortunately, there's no way to tell exactly how bad your overall score was hurt by not getting to all of those questions. You left over 1/4 of the questions unanswered - and that would incur a BIG penalty on the Official GMAT.
1) How long have you studied so far?
2) What study materials have you used?
3) Did you take the FULL CAT (including the Essay and IR sections)?
4) What is your goal score?
5) When are you planning to take the GMAT?
GMAT assassins aren't born, they're made,
Rich