Really cool idea for a game, and the visuals and sounds are very cool! But it would have been good to be taken more slowly into what the different bullets did and how to try and counter the enemy because I wasn't sure when I should use e.g. block or dodge. Maybe some tooltips and dropping the time limit (because I was still trying to remember what the different bullets did when the time ran out) would help? I also only realised at the end that the bullets are fired in the opposite order to how you load them!
It does look and sound amazing though, and there's the core of a really compelling game in there