Based on current information, appears to be an early-stage indie project or mod from developer Fifty Five Games .
"I love seeing the 'skeletons' of these games. It's interesting to see how the developer handled the basic movement before adding all the bells and whistles." Total Submission [v0.01] By Fifty Five Games
This is a "proof of concept" build. Developers use this phase to test core mechanics, movement systems, and the basic UI before adding full gameplay loops or high-end graphics. Based on current information, appears to be an