So, I need impressive 'looking' acoustic songs, the type of songs which would make the crowd go wild?

BTW, I'm kinda new to acoustics, but I can play Drifting by Andy Mckee pretty well. so, suggest some songs of similar difficulty level
anything you play can be "impressive looking" depending on what scale you play it in. myself, i prefer to sound more impressive( still working on that one).
Are we including singing in this?

Honestly, a good performance > technical difficulty of a piece to a person who isn't familiar with the instrument. You can play the most complicated lick, but if it's a 2/3 guitar song, it'll sound weak on its own. Learning how to play songs that are great standalone or learning to give your audience a holistic experience is much more valuable to a performer than hard looking songs. Especially when really hard pieces are often overlooked by people that don't know what to look for.
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Try and look up some artists perhaps.
Kaki King, Newton Faulkner, Thomas Leeb, Eric Roche. Just a few.