The Virtual Boy has a small but active homebrew scene. Fansite Planet Virtual Boy actually has a list which shows the red and black handheld has more homebrews than official releases. One of those is the the new Capitán Sevilla 3D by Team VUEngine.
The game is a sidescroller, and unfortunately just a demo, i.e. no full game. However, it works on real hardware and is open-source. So anyone who wants to finish the work on the game is free to do so. Here is a link for your convenience.