This game with a dark alleyway and a red neon sign reading ‘Terminus’

Google reverse search (not sure why it failed for you) brings up Flight of the amazon queen

This indie game is called "Crypt of the Necrodancer".

This game is quite new, being released in late April 2015, and has achieved very high ratings, 10/10 on Steam and 4.5/5 on Metacritic.

As you noted it's a rogue-like, (proceduraly-generated) dungeon crawler but incorporates elements from rhythm games. For instance the player cannot perform actions such as moving or attacking unless they perform the action in time with the beat of the music.