Hi Cain,
First of all, I'm glad that you liked the game. I am really flattered with your comments. These are all really helpful and constructive suggestions. Definetely, I'll take them into account in the upcoming changes. There are some ideas about using "Enter" and "Escape" keys, also arrow keys for menus. Providing a proper menu for all the game settings, key assignments and etc. is another topic that I want to implement.
These comments make me really encouraged and motivated to do more. Thank you so much. Stay tuned for next phases. Cheers!