I don't know if it's intentional, but the bullets don't always go to where your mouse cursor is. 

The menu system is great. I like having volume sliders for both music and sound!

As soon as I heard the music I loved the game. The game graphics were awesome. The game was also super intuitive! The  one thing I did not like about the game was how slow the player moved. Over all great job , and keep it up!