W. O. W.
Now, I tell you, it takes a lot to impress me. When I opened this (after having my expectations risen by Blastral, too), I expected this to be a cheap straight-liner.
I couldn't have been more wrong. After playing this, I was sure that my mind had been blown out. You have earned my official seal of approval.
Also, my favorite boss is the one with spiral waves and random big bullets. Especially the multi-boss one. The pattern is beautiful.