Games like Simple Space Game

5.84 Wing - Minimalist action-adventure game, with many levels for which you have to overcome a lot of obstacles to collect keys and open doors.

Particle Wars is a vibrant survival shooter with six levels and an infinite mode, where you dodge particles and bullets while utilizing five distinct weapons and various power-ups. This game features new soundtracks, full controller support, and Steam achievements. Your goal is to devise unique strategies for each level and achieve impressive high scores in the infinite mode.

Echoes+ is a vibrant single-player shooter featuring fabulous game mechanics, good graphics, and an amazing soundtrack. Players blast through the universe in a rainbow of sugar rush colors, viewed through psychedelic 80's nightclub visuals. With six game modes, four difficulty levels, power-ups, online leaderboards, and 100 trials, it offers a uniquely colorful and challenging experience.

Chroma Blast is a fast-paced twin-stick shooter where you battle waves of enemies while upgrading your ship's vibrant arsenal. With 31 unique weapons, 6 challenging enemy types, and a deadly boss, players can test their skills and compete on online leaderboards. Its dynamic gameplay offers varied styles and intense action for both casual and hardcore players.

"Universe in Fire" is a fast-paced space shooter game featuring over a million enemy ships across an unlimited number of rounds. Arm yourself with shuttles, spacecrafts, missiles, and lasers to save the universe. However, be cautious as you only have a limited number of lives.

"Kromaia is a 360° shoot-'em-up game that combines classic arcade action with modern technology, allowing players to explore and battle in three-dimensional space. The game features adaptive AI, with enemies getting tougher as the player improves, and true 360° movement and shooting that tests high-speed flying and sharpshooting skills."

"It Came From Space, and Ate Our Brains" is a top-down zombie shooter where players fend off endless waves of undead using a variety of weapons. The full version offers more levels, diverse armaments, a cooperative multiplayer mode, and care packages to aid survival. It’s a fast-paced, action-packed experience focused on intense, cooperative zombie combat.

"Let Them Come" is a pixel-style survival shooter where you play as mercenary Rock Guner, tasked with eliminating alien hordes on a spaceship. Upgrade and customize your arsenal, utilizing FRENZY mode for maximum damage, as you face an onslaught of diverse enemies and boss creatures. Competitive players can climb online leaderboards and unlock new mixtapes as rewards for their shooter prowess.

"Asteroid Bounty Hunter" is a space shooter centered around the veteran hero John and his AI spaceship. The game features unique boss fights, defense of nearby planets from asteroids, and battles against other bounty hunters. The concept revolves around farming experience for upgrades and collecting mastery points from rival ships. — NO RELEASE DATE OR DEVELOPER/PUBLISHER MENTIONED.

"Rocket Riot" is a fast-paced, side-scrolling shooter game with over 200 single-player missions and 300 unique characters. Players blast their way through destructible environments, battling quirky enemies and uncovering wacky power-ups. The game features 8-bit styled graphics and constant action, as destroyed objects regenerate quickly to keep the momentum going.