I see, yes I think it makes sense to create strong enemies at some point, but the main thing is that as of right now, they really put 0 pressure on the player, they are really easy to manage, and just kind of boring bc they got a big health pool, that's why I think adding projectiles or some other kind of attack or mixing them with other enemies might make them more engaging (take this with a grain of salt, I'm not a game developer or anything like that lol)
Btw I basically just commented on the flaws I saw, but on the things I liked, I enjoyed the general sense of aesthetics if that makes any sense, the weapon and enemy sprites, the music choice, how the weapons themselves feel and sound, etc, I'm not good at explaining exactly why I liked all of that but I did like it