This is a livestream of Scott Manley playing an early-alpha technology demonstrator of Kitten Space Agency, a spiritual successor to Kerbal Space Program developed by RocketWerkz.
Manley explores the game's flight mechanics, starting with basic orbital maneuvers around Earth before executing a successful round trip to the Moon. He then demonstrates the game's full-scale solar system by traveling to Jupiter and landing on its moon, Io. The stream highlights the robustness of the underlying physics engine, which appears to handle n-body interactions and interplanetary transfers competently. However, Manley is critical of several aspects, repeatedly mocking a physically nonsensical rocket engine model ("literally unplayable") and pointing out unpolished UI elements and bugs. The gameplay is interspersed with long tangents on his personal interests, including real-world aviation, DJing and vinyl records, other video games, and anecdotes from the space industry. As far as I can tell, the stream serves as an informal first look at a game in a very early stage of development.
Livestream Summary: Exploring the Pre-Alpha of Kitten Space Agency
0:01:31 A Kitten in Space: The stream begins with Manley piloting the game's mascot—a kitten in a spacesuit—in low Earth orbit to demonstrate the basic premise and controls.
0:05:30 First Landing Attempt: Manley switches to a more conventional rocket and attempts a powered landing on Earth. He notes the difficulty in judging altitude and the lack of a radar altimeter, ultimately failing the landing but demonstrating the re-entry and descent mechanics.
0:19:18 Mission to the Moon: Using the in-game transfer planner, he sets up and executes a successful burn to travel to the Moon (called "Luna").
0:24:39 Critique of Rocket Model: Manley points out a significant design flaw in the rocket engine model where the injector plate is located in the nozzle throat. He declares the game "literally unplayable" as a running joke and criticizes the lack of technical accuracy in the asset design.
1:11:26 Lunar Landing & Takeoff: After entering lunar orbit and flying over the surface, Manley manually pilots the craft to a successful landing in one of the maria. He later performs a successful takeoff and re-establishes a stable orbit.
1:44:43 Solar System Reload: Manley discovers he initially loaded a limited version of the solar system. The game crashes, and he restarts to load the full system, including Jupiter and its moons, and an asteroid named after himself.
1:47:40 Journey to Jupiter: He plans and executes an interplanetary transfer from Earth orbit to Jupiter, demonstrating the game's ability to handle large-scale patched conics or n-body physics.
2:02:07 Navigating to Io: Upon arrival at Jupiter, Manley manually pilots a series of burns to achieve an encounter with its volcanically active moon, Io, without using the automated transfer planner.
2:19:02 Landing on Io: He successfully orbits and then lands on the surface of Io, noting that the surface textures hold up reasonably well from a distance but lack fine detail up close. The stream concludes shortly after this final landing.