Google penalized my site and removed the front page from its index !!

My website is aqarcenter com
It seems like it has been removed from Google's Index . I suspect it's because google thinks I have hidden text . Well, it's only for navigation (top horizontal menu) and description of maginfied images (bottom of the page) . It is by design that these text are hidden and displayed with user interaction (or after a certain period of time,, for the sliding images)

What should I do to remove the penalty and restore my site position in google ?

I would recommend to 'unhide' any text on your site as your first step.

Then I would keep posting fresh content on your website and resubmit it to Google. It should appear within a week or so.

The hidden text is meant to be for clarification only. To more understand what i mean, try to click on one of the small pictures in the bottom of the page. A bigger picture will appear with description beneath it. There is no room to unhide all the hidden description and keep the main page tidy in the same time !!!

Your site shows up in the Google search pages. Google your domain name again.

P.S. If you felt I have provided useful information could you be kind and add to my reputation power?

Try copying and pasting the following text:
عقار سنتر
It is the name of the website and used to give my site domain as the first hit. Now, it is no longer there !!
Also, my site rank used to be 22 few days ago for the keyword عقار (meaning real estate in Arabic). Now, it doesn't appear at all in the search result for that keyword.