Here is a little list of improvement (not too hard stuff) :
- The command system isn't very easy to understand (there is no information when the command failed or succeed).
- Above the button to look for a file, you should put a little title to explain what the purpose of it.
- Explain better how it work, because with this description, I had no idea what was the purpose of this game and how it worked (the command system). I had to watch your video to answer my question.
You might think that this list isn't useful since it's the first version of this game and there is a lot to do anyway, but what I suggest are things that are necessary if you want to publish your game mid-developpement, before going elsewhere. Those things don't seems that hard to add, like two text area and a some lines to add in an event listener of text field.