"A malicious orb has cast Savant out of his tower and transformed his surroundings into dangerous enemies! Dodge and shoot your way back up the tower, and blast down waves of enemies as you make your way towards the top! As you progress, you unlock CDs that not only give you new tracks to play to, but also grant you powerful new abilities!"

If you like the game, support the developer, buy it! https://store.steampowered.com/app/259530/

As of now (16.08.2014), it costs $1.49 on the Humble Store. https://www.humblebundle.com/store