I will write a blog post detailing design decisions that I made about this game soon too.
Impressed with the amount of items moving on the screen at once with very little lag. :) Reminds me of the RType SEGA games!
If you have a crappy netbook, like my Lenovo x100e, try playing it in IE9. Works a million times better than Chrome. Never thought I'd ever put that GPU acceleration to use...