That's a really good idea!
Regarding the current room limit in the engine, it was much more of a design decision than a technical one. I actually think it would be relatively easy to increase the maximum number of rooms. It would mostly require a few adjustments to the engine's configuration.
The reason it still works this way is because I want both creating and playing games to be fast. For example, I can make an entire game in just a few minutes on my phone while riding the subway home. If I increase the number of rooms, I'll naturally feel the need to fill them with more content, which makes development take longer.
The same philosophy applies to players. Someone with very little free time can pick up a Tiny game knowing they'll be able to finish it and experience everything it has to offer in just a few minutes.
Since people don't have much free time these days, that's been my design philosophy from the beginning.
The game jam also showed us something really encouraging: people are already creating games that feel much bigger than they actually are, even with the current room limit. That made me even more confident in this approach.
That said, it's definitely something to think about. If the community genuinely feels that larger worlds are needed, it's absolutely something we can develop in the future.