Wow this is quite the innovative idea, taking the concept of bullet hell and using it to charge your attacks that you can otherwise not do.
My only complaint is that when there is a metric tonne of weapons being discharged at you it makes it mite difficult to actually hit your target.
When you charge up your shot by catching the like weapons, the moment you catch a different weapon (and it WILL happen) that charge is completely wasted.
This would not be much of a problem, except that your target is usually assailing you with everything but the kitchen sink, in the later levels.
This makes for frustrating play as most of the time its a giant dodge-a-thon to make sure you can even shoot.
When i say this i am not bad mouthing the game, no for what it is trying to accomplish it does so well, i just wish it wasn't so difficult to actually attack, and believe you me some of the later enemy shots are screen covering random unpredictable shots that will either steal your chance of harming the enemy, or flat out kill you.
The early fights are fun and the weapons are creative enough for this genre, the later levels i feel really don't allow this creative and core game play mechanic the chance, to really shine.
Either way this is good, the movement is fast and precise to the mouse, and the enemies are are versed and well designed to look large and powerful.
Perhaps in the next one you could have the ability to retain a charge by storing it for later, thus allowing you the means to attack when the opening is fit. As many times i saw an opening to attack during the latter levels, but was unable to do so due to having no charge, thus no weapon.
To those out there that want to play, do so, its fun creative and brings a new spin on the bullet hell genre. Just be advised that later game play is long and grueling to accomplish.