game works normal but lags, when i try your advice (Simply right-click drag KoboldKare.exe->"Create shortcut here". Then add "-force-glcore" to the end of the Target in the shortcut's properties.)
and game instantly show this
DirectX installed, 3D acceleration in display settings on, vulkan-icd-loader & lib32-vulkan-icd-loader already installed, so it looks like the game is simply poorly optimized for any other device than the one it was tested on, (which is common on itch io). I hope that in the next update the performance of the game will be improved, (all liquids and their contact with surfaces will lag the most)
it's funny how all steam and non-steam games run on the highest settings on my device, and this inconspicuous game is hell for all 3 devices I tested it on