Jordach is one of a select few modders who like to work against the engine. This game is a piece of art (including textures with meme references and sounds created by Jordach during the jam, which is probably unique) which gets the most out of the engine. Initially it appeared "laggy" to me too, while in reality it isn't - the issue stems from Jordach using the only way the engine provides to set the camera direction, which isn't smooth by default. In order to keep this camera stutter to a minimum, I suggest you enable cinematic camera smoothing and - most importantly - keep your hands off the mouse!
Apart from this, the AIs are a rather amazing demo considering the short timeframe, and a couple effects have been implemented as well. All that is lacking are a couple more maps, which is why in it's current state this is more of an - impressive - tech demo than a fully enjoyable game.
And granted, there are some minor bugs, including a crash. Quality assurance is a time-consuming process finding little place in a game jam; only the most glaring issues can be fixed before release.