This is superbly done. The twist on the classic is simple: create an exit trigger (the pressure plate) that can be used to advance from one level to the next, and then design levels with terrain features that need to be taken into consideration. The concept is simple, but it opens up a lot of design space, and the creator takes excellent advantage of it by creating really interesting levels. It almost feels like this is what Snake was supposed to have been all along.
Other than the missing sound, the presentation is flawless.
Overall the game is brain-burning, but a pleasure to play. Bravo.