Cool concept but too frustrating. There is a softlock if you jump down the first shaft without being big, and the hallway afterwards goes on a tad too long. It plays very slow and with low framerate (unity / didn't use delta time correctly / my laptop is too slow?). Mostly though, a single hit point, no checkpoints and slow running makes it just to frustrating to get back to where you were when you die.
Concept is pretty neat and with clean execution, and from what I saw there were already a few different uses of the big/small states.
Art style is clean and minimal.