display scaling for old fullscreen game

Hello!

For my grandchilds I scale the desktop for showing huge icons.

Unfortunately the game dinosaur world from BBC uses this scale adjustment.
So only the half area is to see full screen.

If I scale the desktop as normal the game displays all.

Is it possible to adjust the scaling only for this game?

Thank you for advice

Erhy
with Windows 10 version 1809

Thank you for your answer.
I tried tip four, but the result was a change of DPI adjustment also for the desktop.

But I had success with editing the "BBC Science\Dinosaur World\game.conf" file.

I changed back to the original values:
Width=800
Height=600

although my screen has 1920*1080

Erhy