This plugins aims to add the capability to Contact Form 7 so you can ask questions to be answered with emojis. There is no better way to ask about a user feellings that an emoji.
Just install, make shure you have installed Contact Form 7 and is active. This plugin will add a new button to add emojis, you just have to set the name of the field and in the values add as many emojis as you like. One emoji per line, for example to answer this question:
What's your favorite pet :dog: :cat: :tropical_fish: :lizard:
And this will be the result