There isn't a whole lot to go on with those screenshots, but I will try to give you a few tips. They're mostly little things, but maybe they'll give you something to think about.

Images
You're using several background images. If you are planning on going live with your website then make sure you are actually allowed to use and modify (Photoshop) those images to avoid takedown requests by their respective owners.

Color scheme
The purple and blue colors lack contrast and will be hard to impossible to distinguish by color blind people, including deuteranomaly which is the most common form. Roughly 8% of men are color blind so it might be worth taking that into consideration. Either change the contrast or use different colors.

Password verification
Consider making users enter their password twice. You cannot detect typos in a password field, so users will be confronted with it when they try to sign in. When they can't sign in they will either create another account or just leave.

First and last name
Don't make them required fields. There are plenty people who don't want to share that information for privacy reasons. Only make them required fields when it is absolutely necessary to use the site's main features.

Spam check
Unless you're from the UK, chances are you're going to have to leave the site to Google the answer to that question. Not to mention you're going to have to update the answer the moment there's a new prime minister. You want spam checks to be as simple as possible with little to no maintenance. There are many captcha services available, I suggest you use that or something similar.

Security questions
Don't make them required fields either. You're trying to make your site look more important than it actually is. Security questions are typically for services that have e.g. credit card details stored for online purchases, or when accounts are extremely hard to impossible to regain control of in case of when the accounts get compromised. You can always make those fields required the moment users start storing sensitive information.

Good luck ;)

Its looking pretty good there is some thing you could change.

I feel like the style of it is great overall, but the text in the bottom left corner should be changed to a different font. Your entire registration system is very smooth, clean, gradient. And then it looks like Arial text, haha. Overall, beautiful work, I'd just update that text.