Games like Balsa Model Flight Simulator

"KitHack Model Club is a simulation game that allows 1-2 players to build and customize RC vehicles in a multiplayer setting. The game features physics-based mechanics, encouraging players to make every design decision count. With numerous parts, paint, and decals to choose from, create and race your unique vehicles in this ultimate model-building platform."

"Flyout is a single-player simulation game that offers players the freedom to build and design their own aircraft with detailed modeling tools and realistic physics. The game features delightful visuals and a variety of configurable components, but is reported to have bugs that may impact gameplay. Players can test their designs on a procedurally generated earth-sized planet, with wing shape, fuselage drag, and engine performance all affecting flight behavior."

"Homebrew - Patent Unknown" is a unique puzzle-platformer that challenges players to manipulate time and space. Using the Copybug tool, players can duplicate objects and manipulate their properties to solve puzzles and overcome obstacles. With its mysterious setting and innovative gameplay, "Homebrew - Patent Unknown" offers a fresh take on the puzzle genre.

"Starship EVO is a work-in-progress space sim that offers a creative building experience, allowing players to build and customize starships, space stations, and handheld weapons using a variety of tools and options. The game currently features engaging space battles and plans to add a survival mode in the future. A Server/Client framework is used for multiplayer, which requires port forwarding." less than 400 characters, more than 100 characters.

"SimplePlanes" is a sandbox-style construction simulation game that allows players to build and fly their own aircraft. With realistic physics and an intuitive building system, players can design planes that range from simple gliders to complex military jets. The game also features a variety of challenges and missions to complete, as well as online sharing capabilities for custom-built planes.

"Main Assembly" is a robot construction and design game that allows players to build robots of any shape or size, program their movements with visual programming, and test them in custom-built obstacle courses. Players can also collaborate with others to create shared worlds and compete in bot challenges. The game offers a "Starter Collection" of combat-ready machines for instant brawling.

SimpleRockets 2 is a physics-based space simulation game that lets players build and launch rockets. The game features a detailed design system, realistic orbital physics, and a variety of challenges to complete. With a sandbox mode and career campaign, SimpleRockets 2 offers endless possibilities for creative and technical exploration in space.

Theme Park Studio offers a comprehensive toolset for designing and building custom amusement parks, allowing players to craft unique rides, terrain, and environments. With integrated sharing and browsing through community creations, users can explore and publish parks easily. The immersive "Enter Park" mode lets players experience their designs firsthand, including VR support for a fully interactive ride experience.

"Automation: The Car Company Tycoon Game" is a simulation game that allows players to design and manufacture their own cars. Players start by building their own car company, and must manage various aspects such as research, development, design, production, and marketing. The game features detailed car customization, including engine and transmission design, and allows players to compete in a dynamic market against AI-controlled competitors.

"Sprocket" is a tank design game that allows players to create and customize tanks using a dedicated designer. The game presents realistic armor mechanics and covers tank design challenges from WW1 to the late stages of WW2. Players can design hulls, turrets, armor, and cannons by setting thicknesses, shapes, and angles, while considering the trade-offs between space, weight, and firepower. Currently, tutorials are lacking, so a solid understanding of tanks is recommended .