The sparse graphics and simple audio reminded me of old Atari VCS games. The three-pixel main character works surprisingly well, as does the trail of footprints you leave behind as you walk. The puzzles get more challenging as the game progresses, and I enjoyed exploring the environment. A bit more variety in the scenery would be nice.
Unfortunately the game displays room names in high resolution, not within the 64x64 pixels constraint of the jam, and so will lose some marks in the Authenticity rating.
But that aside, I really enjoyed playing this. Nice one!