I'm not sure if this is intentional or a bug but while the game allows me to save any time I want there is no option to load a saved game file. I played on Linux.
AMD Ryzen 5 2600X | 16GB DDR4-3000 CL15 | MSI RX 580 8GB Gaming X | Mesa 21.0.3 | Manjaro 21.0.3 | Mate 1.24.1 | Kernel 5.12.1-2-MANJARO