After a couple hours worth of play, the game slows down to a crawl and exhibits clear signs of memory leaks.
I suspect it's in the 'bloom' code, because the first signs of the game breaking down are things with lighted reflections either becoming transparent or bright like someone's shining a flashlight at the screen. Then everything starts to get screwy, phaser fire, the health 'flashes' when your health gets low - all start suffering and make the game unplayable, so much so you have to restart the game.
Also. I submitted a bug on the issue and another in game. I think that may not have helped it and you may have a buffer overrun issue with the submission box - as I had a lot of data in there! and i do mean a ton!.