This is an out-of-band release that fixes a bug where the game gets stuck at the end of a level. Thanks for those who found and reported the bug!
The next release will have a major new feature and it is coming slowly but surely. Stay tuned for it!
Download free from itch.io: https://congusbongus.itch.io/cdogs-sdl/purchase
Release notes: https://github.com/cxong/cdogs-sdl/releases/tag/2.3.1