Played around with Rooms a bunch as a "consumer" of rooms and frankly, haven't had such a delightful experience with a game-like product for a while.
The overall experience is incredibly polished, I love clicking through and finding easter eggs, and some of the game-oriented rooms are genuinely fun and addicting.
Personally - I'm excited/curious to see how this evolves. Think it would be an awesome game for kids to help them learn how to code and build worlds a-la Minecraft, or (selfishly) I want to see more games and puzzles built out so I have more to play!