Now, after reading the article, I gave your search engine a try. I was looking for that futurama its a trap meme (pretty much pops up on any image search here https://www.google.com/search?q=futurama+its+a+trap)
The problem is, the search engine you built is now very text-heavy, which seems to be usually very unconnected to the actual meme. So, searching for "its a trap" did not yield the results I was actually hoping for, but made total sense looking at how the search was implemented.
Are you planning to implement an actual tagging of the content of some sorts? Maybe a clustering of similar objects (like iphone clusters similar peoples faces in the gallery) and then tag those clusters with keywords somehow?