Clean, Crisp, and Modern App User Interface

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This customer received 22 app designs from 6 designers. They chose this app design from Lauren as the winning design.
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I've created the basic App interface, but it could use a face-lift to make it look more modern, clean, crisp.
Its a chat bot app with a humorous, cartoony look. Take a look! Will be a fun project to work on :)
Required UI Elements:
-- Character Portrait
-- Chat Conversation area (designed to be scroll-able, by swipe)
-- Text in the chat (choose a text that looks great)
-- Push-to-talk microphone button, with changed graphic when pressed
-- An arrow, that when pressed will flip the character around..put it where you think is best
-- A settings button
-- A credits count text and credits token
-- A thinking icon/animation. (Animates to fill up when 100% complete)
-- A character level button, pressed takes you to unlocks menu
-- Background (any color, but I kinda like the green one I picked)
Final product must be supplied in layered .psd
Think like these examples:
http://www.pinterest.com/uipalette/ios-7-app-design/
Industry/Entity Type
Product
Look and feel
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