A fwooshy, intense, procedurally generated fly-em-up · By Fractal Phase
The window opens but it is extremely small on my screen. Mac doesn't give the option to make the window larger, wondering if there was a solution for this
Just hit command + F. Should make it full screen.
There is also a "fullscreen" option in the options menu, in case Command + F doesn't lead to the results you expect.
