I'm kinda bias by giving you more rating because I originally like Django style game.
It's a shame that I can't upgrade between the levels and can't shoot diagonally.
It'd be nice if there is a clear line for player's restricted area.
I personally hate defending games. So having to defend the stand is a negative for me.
The artstyle, music, and sound are all good. Theme is direct. Story is a bit mid but it's fine.