yes it is actually a whole game, for values of “whole”; it’s small in scope, given that it was made in less than 2 weeks. it’s also more fun than you might expect from a 3D platformer thrown together in such a small timeframe (though it’s obviously not going to be a masterclass in anything). there’s even lore! and a soundtrack! and source code!
advice for Windows players: if you’re having trouble using a non‐Xbox/XInput controller, add the game to Steam (“Games” → “Add a non‐Steam game to my library…”) and enable Steam Input for your controller there. if you’re still having issues, try removing/disabling controllers you aren’t using (it seems to only poll “player 1”).