Hey. Thanks for the port on Linux. How can I enable the window mode in this game? And yes, I know that my English is broken.
Modification of Spelunky Classic · By
Game starts in borderless window. Alt+Enter - toggle fullscreen/borderless window.
Currently there is no normal windowed mode. It is possible to resize borderless window, but I don't know how to do it on Windows.
You can try this solution.