If you have problems.

- You can activate the cheat system and enter the number of any location ( 1 - 2 ) and the level number ( 1 - 100 main game and 1 - 50 DLC ), to do this, go to any level and press 3 clicks in the upper left corner of the screen with the left mouse button.

- The game is saved automatically only when the level is completed or when the "Save" button is pressed.

- VERY RARELY A SAVE CAN GET CORRUPTED and then you will need to go to any level using the level selection menu and activate the CHEAT SYSTEM there. Sorry, I don't know how to fix this problem, but it is very very rare.