The two of us (Dean and Jim) finished our first 7DRL game. We're pretty proud of it, and think it was a success.
I (Dean) have spent a lot of time working on a roguelike already (still in development), but this was a really good chance to try something fresh and new. I definitely learned new stuff from this. We used BSPs for generating the interconnected rectangular rooms, and it was much easier than we expected. I feel like I have an easy time being intimidated by big words and phrases like "binary space partitioning," but I was happy to realize it wasn't that tough.
We wanted to keep the game simple, of course, and I think relying just on mouse controls made the game simple to design and simple to play. I hope people check it out and find it fun.