I beat the whole demo. I really looked forward to playing your game, so it was nice to finally seeing in the the DD. You character is really cute. The game looks like something I would expect to see on nintendo store, so I think you should try releasing on there when the time is right.
My scores ranged from S to D or E, but it did not feel to me like I was playing very differently. Weapons felt really powerful when I actually remembered to use them. I also kept forgetting about jumping, but that's just me not playing much.