Wow, at first I was super ready to dismiss this as just another VS-like, but then...
-the tank-controls make the slow movement a lot more interesting, and immersive cause here, you are piloting a vehicle indeed.
-Most bullets/baddies not following you (as enemies usually do in the genre) also makes it a lot more fun to dodge in between them, rather than just tiptoeing around them.
-Collectables being a separate thing from enemies also makes it more interesting, its not just about killing, but collecting as much while avoiding shit.
Dude you made a game that I admire, in a genre I despise.