I like it a lot! Firstly, I think the game nails all the basics. The shooting feels good, there's a lot of nice juicy feeling in shooting the enemies, sound effects and music add a lot to making the game feel satisfying, etc, I think overall it's very solidly put together twin stick shooter.
But I just wish I could control my character!
I actually really like the idea of 'you move in the opposite direction to where you shoot' I think that's really interesting, but to me it feels more like a fun novelty that's only fun for a little bit before it starts feeling frustrating.
Here's my suggestion: Make that control mode a temporary power up. Make it so you normally control the character with standard twin stick controls most of the time. Occasionally, give them more enemies than they can handle, and let them optionally go into 'ultra' mode which gives you a much more powerful gun/more projectiles, but you go into the 'move in the opposite direction to where you shoot' mode. I love that mechanic, but I don't think I'd play an entire game with those controls, but if you give the player a powerup while in that control mode it'll feel really good and keep it fresh!