Unfortunately I couldn't play this, although unlike everyone else I think it was my drivers, which I can't update. (I have to use a command-line hack now to play Godot games made in the latest version of the engine because of similar problems.)
Uncaught exception thrown in Thread[jME3 Main,5,main]
RendererException: compile error in: ShaderSource[name=ShaderBlow/Shaders/LightBlow/LightBlow.frag, defines, type=Fragment, language=GLSL100]
Fragment shader failed to compile with the following errors:
ERROR: error(#272) Implicit version number 110 not supported by GL3 forward compatible context
ERROR: error(#273) 1 compilation errors. No code generated
Also, just a jam note - if you have a game-breaking problem (or any problem) and have to update a game after the submission period has closed you have to keep the original version of the game available, with the update as an alternate download.
Sorry I couldn't play it - the screenshots look great so I was intrigued. As far as I know I've also never played a game before that's been developed in the engine you used so I was curious about it.