The development of the game is still going, I have redone some maps.
For example, before I had some maps with placeholder photographies :
Now I have drawn the trees to be more consistent with the overall style :
I have done more animations and added more content for some levels, the content is mostly done now maybe little things to tweak here and there and some dialogs to change.
On the programming side, the format used for the images are dxt1, dxt5 for the compressed format and tiff for the uncompressed format. It improved the loading and the memory consumption of the game by a lot!
I am working on a trailer and some marketing images for steam.