Here's what I got for linux!:
On linux: Can't see your character/ Accessing the menu gives error: 'ReferenceError resetbody is not defined'
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Run 'chmod +x ./nw' and then './nw' instead of './Game'. (Thanks to J L for this solution!)
On linux: game.exe gives an error/ .nw hangs the game with fontconfig errors/ game lags considerably after a minute/ game gives you a black screen
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Download this patch (Tested on Mint 18 Sarah Cinnamon):
https://drive.google.com/file/d/1iegd1ATb-jwvsBEXwl_FydQweATVQKhd/view?usp=shari...
Copy and paste the files from this patch into the game folder. Run the Game executable that comes with the patch. (Thanks to DoubleU for the patch and this solution! https://pastebin.com/21Yi6vnt)
Alternately, go to the nwjs website and download nwjs 0.45.6 (https://dl.nwjs.io/v0.45.6/), then copy the files into the game folder. If that doesn't work, try other versions of nwjs (Thanks to Wild Bill for this solution!)
Alternately, try running the Windows version of the game using WineHQ (https://www.winehq.org/)
Alternately,
(Tested on Manjaro (Arch)):
If # echo $FONTCONFIG_PATH'
returns nothing, then execute:
# export FONTCONFIG_PATH=/etc/fonts
Don't forget to # chmod +x ./nw
(Thanks to Casul51 for this solution!)