Steel Ranger the “indieretronews game of 2018” by Psytronik is quite amazing and advanced c64 game. It recalls the same concept as Turrican which is to shoot everything that moves and go into various levels while approaching a hostile alien artificial intelligence.
Screens:
Weapons and upgrades are available a-go-go, with tons of enemies to destroy as well.
Video Gameplay(by channel TheHobbyLodge):
https://odysee.com/@thehobbylodge:5/steel-ranger-psytronik-c64-homebrew:8
Also watch the trailer:
Links
https://psytronik.itch.io/steelranger