It's okay
It's a neat way to play a game, but I dislike the fact that you have to type in the EXACT command to move on. I can't even get past level 3 because I have no clue what to type, and I've tried tons of different things and combinations of words. You should try to make it so that each room has many different ways to get through them, that way you not only make the game easier, but maybe even more fun since there would be multiple ways to complete the game. Maybe try a few easter eggs too (like typing in "cat" makes a random cat appear on the screen). Another thing I disliked was that at first, the game didn't tell me you had to click on the area next to the arrow first to type, so I was lost for a minute. I also dislike the fact that pressing enter doesn't work, you have to click submit. Fix that and it makes it much better :)
Overall I like the concept, and if you follow what I said you could have a pretty good game for people to play! Oh, and also try to add a storyline in (like why the guy is at that place in the first place). It might make it more interesting and make room for sequels if this game does well ;)
And for level two (with the box), add in a command that is "light box on fire" or something along those lines, it would add more fun to the gameplay.