Take a look at the login screen here at UX.stackexchange:

When you compare this with your mockup, yours looks crowded and a bit confusing. One of the reasons that the login screen feels overwhelming, is that you ask your users to make multiple choices at the same time:
- Facebook or email
- Log in or sign up (and what does connect mean? is that equivalent to logging in or signing up?)
The Sign up button is not completely clear - do I need to enter my desired email address + password in this screen, or will clicking the button lead to another form?
The stackexchange login on the other hand:
- treats log in as the primary option; signing up is possible as well but secondary
- does not explicitly mention a verb with the Google and Facebook options - it is already clear from the context that this is a log in screen
- uses colour and icons to support easy recognition of google and facebook
- uses both labels and sample values - a pattern such as [email protected] is easy to recognize