Yes defiantly let it all be indexed, you would only not index things like a “tag-page” where it is a duplicate. Sure more would be better, but something is way better than nothing. If the pics have alt tags and file names that fit the small amount of text present, and they “breadcrumb” to each other via links, Google my think it is a slideshow. Google likes slideshows cause they are the best way to visually compare stuff! I think that the description of the format of your slots reviews is better than most peoples anyway. lol. 
byebye, best of luck and this is just my opinion.
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