This was supposed to be submitted to a game jam a few months ago, but I ended up missing the deadline. The theme of the jam was "the future".
I recently tried to finish it. It's pretty unbalanced and after a certain point it gets impossible to progress, but maybe someone will find it interesting.
This is written in C++ and built for the web with emscripten. Link to the source is on the page. The repository also has a Qt-based editor for the tech tree.