Quadruple Quartet

Tried to upload a web build, but there was a massive problem with changing scenes, so a downloadable version is what you're getting today. I'll add a fullscreen toggle later, and try to add a web version again at some point.

Update: it seems Godot 4 has some issues with web exports; unless I were to remake this for Godot 3, the only way to get a web export to not hang for minutes when changing to the game board scene seems to be removing the shader that highlights cards when hovered/selected. Better than nothing, but far from ideal.