Got a high score of 3459. The graphical improvements to the game do make it feel better, especially the lighting and particle effects on enemy death. It also seems like in the original, the enemies spawn so fast and overwhelm you, especially with your measly pea shooter, so it feels more like you're just running and dodging the enemies than fighting them, while in v2 you're being a little more active. I still do think you feel pretty weak even in v2.
I like the addition of the ground pound move, and the way the die turns is perhaps the coolest part about the game, so then it's neat how you slam down after that. I was confused at the shield move at first, thinking I could take a hit; but it's just an orbiter. Really I think the shield should be slightly more powerful, being able to take more than 1 or 2 hits, but with it slowly decreasing in power over time, because otherwise it doesn't feel that meaningful of an upgrade.
But really the biggest thing you could do to give the game more polish is to have the characters and enemies not be cylinders and prisms. Or at least make them stylized, idk. That's probably difficult obvs, I'm not a 3d artist, nor do I have any idea what the character models should look like, but it's def the kind of thing that helps first impressions, which are pretty important.
I think sound doesn't work on the web version.