I'm really flattered by the graphics praise!
I am about to put a disclaimer on the game page that you can just type the name of the object you want to do an action with. for instance, if you want to "take the knife" you can just type "knife". As for sometimes you not being able to type, maybe the GUI just lost focus, so just press TAB and it should work!
I hope you can now enjoy the game and tell me what you thought of the whole experience later :)