Hey astrolingus! Thanks for letting us know about this issue. Would it be alright if you give us a bit of information to help us debug the issue?
1) What resolution is your monitor?
2) Is your operating system 32 bit or 64 bit? This will be shown in System Settings which you can find by searching in the start menu.
3) Could you send me your savedata and options files? You can find your save data at: C:\Users\<username>\AppData\LocalLow\Laundry Bear Games\A Mortician's Tale and send it to us via email@example.com
Hopefully we can get this sorted quickly!