Fun icon set for language learning web application

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This customer received 24 icon designs from 11 designers. They chose this icon design from YujayYu as the winning design.
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Icon Design Brief
Verbal Earth is a language learning website and app. We need a suite of icons/images to convey meaning and add an interesting visual feel. We’re open to the style and theme for the project, and encourage creative input. (e.g. In the current working prototype were working with open source farming themed icons - see below). The icons will be seen on the website, and at various stages of a lesson, which is designed to be gamelike. (See Duolingo or Babbel for examples)
Icons to convey the following meanings are needed:
1. Information (when giving hints, or other information)
2. Warning (e.g. about to lose lesson progress!)
3. Upgrade (invitation to register with email or upgrade)
4. Patience (shown when learning makes mistakes, should be encouraging)
5. Lesson done - victory!
6. Progress (informing learner of progress)
To give a feel for how these icons will be used, here are some screenshots of other language learning software, and out prototype:
https://www.dropbox.com/sh/e20tx08pcff0u54/AADolRO7DnmpnR4SAwrH_5t2a?dl=0
https://www.dropbox.com/sh/2zlzp2gydq2cd0n/AADGO31iFEUYhrViX8Yy12tfa?dl=0
Target Market(s)
English speaking adults learning a second language for business or travel.
Industry/Entity Type
Learning
Font styles to use
Colors
Colors selected by the customer to be used in the logo design:
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.
Elegant
Bold
Playful
Serious
Traditional
Modern
Personable
Professional
Feminine
Masculine
Colorful
Conservative
Economical
Upmarket
Requirements
Must have
- Icons should be large (at least 1024x1024) so they can be scaled down to smaller sizes. Color scheme should be simple, with each color in it’s own layer so that color can be changed to match theme colors for the website/app. All icons should roughly fit in a square (roughly the same height/width). PSD format.