I decided to do the tutorial again to refresh my memory and I discovered what I think is a bug. I hit the part where I added the verb “watch” to the TV object, and I have it set to print text that says, “You watch TV.”. When I run the game and enter the command, “watch TV”, it says, “I don’t understand your command.”. This works fine on the PC version. But the online version doesn’t seem to accept new verbs. I even tried to set the verb “watch” to run a script, and selected “print a message”, and it gave the same result. This problem doesn’t exist in the PC version. Edit I just did some testing. When I run the browser version on my PC, it works fine. BUT, when I run the browser version on ANY browser in my iPhone, the problem occurs. Any verb I add doesn't work.

Could it be that it isn't autosaving on some browsers?
IIRC, you might have to manually hit the 'save' button before testing.

I tried it again today and the issue seemed to have resolved itself. It was probably a temporary glitch or something. I was doing things correctly. The verb was showing up in my saved game for the object. But it just refused to work. I even created a test game to create a room with an object in it that I attached a verb to, and even in that test game, it wasn’t working.
I tried it again today, and everything worked fine. So I’m assuming that it was probably some temporary glitch or something. I couldn’t tell you what the cause was but it’s resolved now.

I made another discovery. The problem came back. But I think it’s an issue only with that particular game file. I couldn’t get any verb that I added to work. It would be in the list but when the game was run, the verb wouldn’t work. I deleted the game and recreated it from scratch and everything works fine with the new one. I think that particular game file had some kind of glitch going on.