For people having lag issues...
The best way to play this is using NW.js directly instead of the supplied Game.exe:
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Same goes for other games made using this framework (they all have a "www" folder). This is cross-platform and works natively on Mac and Linux as well.
Once installed, you launch it by passing the game's location to the nw binary. Easiest way is to open terminal in the game directory and type "nw ." with the dot. On Windows you may need to specify the full "C:\path\to\nw.exe ." (don't forget dot). Detailed instructions:
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In this game, there's a bug that causes the save directory to point to the wrong place when you start it like this. The symptoms are that you cannot save and get EACCES errors when trying to change options. To fix this, you need to edit the "www/js/plugins/SavePathRelocation.js" file on line 65.
Change:
var execpath = path.join( process.execPath, '..' );
To:
var execpath = path.join( modulepath, '..' );
Do this before launching the game, of course.