Games like Silkworm

"Enemy Mind" is a side-scrolling space shooter for PC with a classic 8-bit art style and 8 levels of challenge across 70 waves. As a being of pure psychic energy, you can take over and control any of the 20+ unique ships you encounter, each with their own power and ability. The game features an adaptive story system that changes with your play style and offers multi-player co-op for up to four players. The soundtrack is an original chiptune-inspired creation by Rainbow Kitten.

"Drifting Lands" is an action-packed, hack-and-slash side-scrolling game with RPG elements. Pilot your aircraft through treacherous terrains and enemies, while upgrading and customizing your ship to fit your playstyle. Engage in challenging boss battles and intense missions, with the freedom to choose your own path as you progress through the game.

"Alien Storm" is a classic arcade-style shooter game where players fight against an alien invasion. The game features fast-paced action, multiple weapons to choose from, and a co-op mode for up to three players. Players control a team of secret agents with unique abilities, battling aliens across various environments, including cities and space stations. The game's over-the-top action and humorous tone make it an enjoyable experience for fans of retro shooters.

"Natsuki Chronicles is a single-player Science Fiction Shooter game with a good plot, pretty visuals, and an outstanding soundtrack. The game offers a story mode that follows protagonist Natsuki's past and present over 10+ stages, and an arcade mode for quick action with online leaderboards. It also includes customization watch three weapon types, a wide variety of equipment, and a 'Bullet Trajectory Display' function for added strategy."

"Jets'n'Guns 2" is a side-scrolling space shooter where you play as a brave pilot tasked with saving the universe from a powerful enemy threatening to wipe out all sentient life. Engage in epic battles, travel through space and parallel dimensions, and unleash an arsenal of deadly weapons in this action-packed adventure. Local co-op play is also available for even more explosive fun.

"Aqua Kitty: Milk Mine Defender" is a fast-paced, retro-style shoot-em-up game. Players protect a school of cat milkmen from robotic enemies while they extract milk from the ocean floor. With upgradeable weapons, power-ups, and multiple levels, it's a challenging and fun experience for fans of classic arcade games.

In Shoot 1UP, players control a fleet of ships instead of a single one, with each 1UP collected adding to the armada immediately. The game features up to 30 ships on-screen at once, and weapons upgrade as more ships are collected. Local co-op play allows for up to 60 simultaneous player ships, and sacrificial bombs become more powerful with more ships. The game offers a challenging yet enjoyable manic shooting experience.

"Stardust Galaxy Warriors: Stellar Climax" is a 1-4 player couch co-op action shooter game, combining SHMUP and Brawler-like gameplay with light RPG elements. Choose from 5 distinct characters, each with special abilities and superweapons, and an extensive selection of primary and secondary weapons. Play through a 10-level campaign, Endless Gauntlet-mode, and Challenge mode, all set to an album-length soundtrack. Meet Gundula von Übelvamp, but don't expect shocking plot twists.

Super Cyborg is an old school non-stop hardcore run'n'gun action game! You are an elite battle cyborg who is sent in to investigate a series of anomalies on a mysterious island. The merciless alien known as the 'Xirxul life form' has been awakened by unwitting scientists and now: all humanity is in danger!

"Platypus is a sci-fi shooter game with great mechanics, sensational visuals, and excellent music. The game features local multi-player options for up to 2 players in a split screen format, as well as single-player mode. The story revolves around the invasion of the neighboring country of Mungola by the industry-laden Collosatropolis, with the latter expecting little resistance."