Download the file, it's a zip, so you need to decompress it first.
1) Right click it and select "Extract All" and follow the instructions.
2) Then in the uncompressed folder double click the "A Lakeside Walk in the Dolomites" executable
You need to install the DirectX for the shader handling the boss health bar to work.
https://www.microsoft.com/en-gb/download/details.aspx?id=35
Hi, I'm not able to update the game right now but you can add the German localization by copying one file from the Steam version to the itch.io version (you get a steam key if you buy the game here)
The file is C:\Program Files (x86)\Steam\steamapps\common\Pepper's Puzzles\assets\localization\de.json
Just copy it to the same folder of the itch version and the German option should appear when you next launch the game.