The menu has EXPORT SAVE and IMPORT SAVE. In a Stop Killing Games jam, letting the player take their own save file away with them is the sharpest possible tribute to the theme. That isn't a detail, it's a position, and you're the only entry I've played that turned the jam's cause into a design decision rather than just narrative. Bravo.
The build screen is enviable. A Part Library with 40 draggable parts on the left, a Component Assembly Table in the middle with slots for Chassis, Mobility, Suspension, Power, Sensor, Utilities, Propellant and Vertical, and an Engineering Telemetry panel on the right updating live: Top Speed 58, Traction 61, Stability 63, Durability 59, total mass 15.8t and a "Course-fit estimate: 61/100". And the briefing BEFORE the build gives you the terrain data (Plain 41%, Sand 20%, Rock 39%, crater severity, max slope), so you're designing the rover FOR that specific course. That's real design, not decoration.
The race screen keeps the loop closed too: Battery / Boost Fuel / Grip / Rover Condition, checkpoints, mission time, and a WEAR REPORT showing each component degrading in real time. When the sensor warned me "SENSOR: ROCK HAZARD AHEAD", the part I picked in the workshop had a concrete function on the course. That's a beautiful bit of closure. The pause menu listing every control and the "Peace, love and engineering!" in the menu footer are lovely touches.
Three practical notes. I got stuck in a dip in the terrain at 0 km/h and couldn't get out even with boost. There is an "R - recover" key in the pause menu but I only found it afterwards, so showing "press R" on screen when the rover has been stationary for a few seconds would help. The pilot name is mandatory (minimum 2 characters) and Start Journey errors on an empty field even though the text below says your score will be saved as Guest, so those two messages contradict each other. And it's a lot of information at once, so a one click "recommended rover" preset would help people who only have three minutes.
Along with A Game About Driving Fast and Until The Last Mile, this is the most ambitious trio I've played here.