I think there is 7DRL season going on at the moment, I'm not sure. While I'm working on my main three projects it could be "fun" to write a smaller game. The problem you have with larger projects is that they become less and less manageable which is something that just happens. For a reason.
I do have a fun plan for this "7DRL" project in which I'm trying to write C++ with procedural style (also known as C) but with some classes where they are the most logical solution. The code is going to be more "modular" as more functions can be stacked in one file, rather than C++ style two files per class.
I wouldn't do this without a great idea for gameplay which I have had for couple of years. For simplicity I'm going to use ASCII graphics with SDL2, similar to what I have in Teemu. In fact I'm probably going to use Teemu's GUI (+fonts) and change it to procedural style.
Another reason I'm doing this is that I really need some time off from my large projects.