I downloaded the source code and ran the game in my Godot editor. I'm sure you were just time crunched or something. Ideally you would provide the exported .exe and .pck files for those people who don't use Godot (or won't bother running it from source code like I did). Exporting a web build is a great idea for a game jam also.
As for the game itself, the soundfx of the walking got old quick. I suggest lowering the volume down some and varying the pitch slightly each time it plays (randomly set the pitch scale [such as $AudioStreamPlayer.pitch_scale = randf_range(0.9, 1.1) ] through GDscript each time you play the sound). The graphics were fine and I liked the idea of the game. Keep at it!