Nicely done intro, it had very strong N64 vibes. The whole vibe really worked: the audio, the timing of the enemy appearances, and the way the bosses were introduced, slowly turning in before engaging. Great job on that; it all felt very reminiscent of that era.
I loved the music too. I was jamming all the way to the end. Also, great job getting a 3D game running this smoothly on WebGL. The camera and crosshair work were really well done too. Great job on this. It definitely brought me back to older times.