English education mobile app UI design

I'm making an app for English listening vocabulary learning. The idea is similar to an app like this: [login to view URL] . See screenshot #2, #3. This job involves app user interface design only, no logo / icon is involved. Requirements: 1. You are required to design 3 screens for iPhone, and 3 screens for iPad. Screen 1: Course list (similar to screenshot #2) Screen 2: Word flash card Screen 3: Listen and spell (similar to screenshot #3, but not the same), it is required to display a small touch keyboard here, note I prefer the keyboard is not at bottom, but mixed into the spelling UI 2. The design will be implemented using HTML5/CSS3 (via phonegap), so no native controls should be used. 3. Design should use 3 fonts only, Lato (Free), 'fjallaone' (Free), and TisaPro. Style preference: I prefer a platform neutral style, that doesn't look too android-ish or too apple-ish. Lighter and elegant graphics are preferred. Our logo's signature color is #669900. We've been using a combination of green, yellow, and white in our other designs, which I can show you. Some of my opinions: Windows Metro style is ugly. iOS 7 is ugly iOS 6 & Android 4 is good. Delivery: Adobe Illustrator AI file (preferred) or Adobe Photoshop PSD containing the design. Detailed requirements will be given to you upon hiring. Attached is proposed screen mockups.