I am one of those Ratings! i didn't leave a comment though, sorry...
My opinion on your game was similar to the other comments, not a very deep game, not a strong connection to the theme, but enjoyable to blast enemies to bits anyway, i think if you could shoot two shots at once, in any direction, it would allow things to get harder and more complex for the player.
here is mine, a platformer with one thing to climb and one set of precise mechanics
https://itch.io/jam/gmtk-2019/rate/462355