TDP 6W

To save a game you have to click the free slot -> Steam+X -> write anything -> click Enter. You know it saved when it automatically goes back to game. There is no way to overwrite saves without writing on keyboard again. You can die and/or block yourself in few places so it's inconvenient as you should save every 20min to not lose big chunk of progress.

There is a problem probably with parallax scrolling. FPS temporarily drops to single digits when game processes new animations such as opening inventory or moving mouse WHILE your character is moving. Inconvenient but playable.

Again with parallax scrolling - sometimes when the scene is changing, the game is not refreshing it's graphics. So whenever you are stuck on black screen you just have to move your mouse, draw a circle with it, whatever. It will refresh the screen to the correct scene.