Update README.md

Author: PolyMeilex

README.md

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 # Neothesia
 
+Neothesia is a cross-platform MIDI visualizer, build completely in Rust.
+It helps people to quickly learn how to play piano.
+It takes music notes from a MIDI file as an input and displays them as colorful falling blocks on a virtual piano.
+
 Opensource Synthesia was abandoned in favour of [closed source commercial project](https://www.synthesiagame.com/)  
 Goal of this project is to bring back Opensource Synthesia to live, and make it look and work as good (or even better) than commercial Synthesia.