I wouldn't call this a bad game, I would say "unfinished." I'm not saying it necessarily needs more content; there's nothing wrong with being short. What you have here is good, but there are a few fairly simple things I think could be done to make the game world a little more cohesive.
I don't want to go into specifics. Honestly, I just wrote this review because I wanted to encourage you to keep exploring Inform, because I really like some of the things you've done with this. And, unless you're already working furiously on your next project, I would encourage you to put a little more time into this one.
If I were to make one specific suggestion it would be this: get rid of the opening preface about the game not being good or interesting. It's not true, and you shouldn't sell yourself short!
Like "And a Hippo New Year," I played this with my young niece, who was excited when I told her there was a new game featuring the House Hippo. We had a great time solving the puzzles together and trying to score all the points, which you don't need to do in order to win. We almost gave up on finding the last couple of points, but when we did, I realized some clever things about the implementation I hadn't noticed before. The game is rather short, but I don't see that as a bad thing.