2. Create a simple, custom, graphics-only (no collisions / physics) game engine using Entt (https://github.com/skypjack/entt) and Panda3d. The engine would rely mostly on simple inputs, like mouse clicks, and 3d graphics.
3. Configure clangd to error on features outside C++11 then refactor both projects (1 & 2) to use C++ 11.