In your attempt, where you changed the value, did you make sure, that the hardware fullscreen had the dot for being selected? I could reproduce with resolution 1920x1000 (Lix v. 0.10.10). A higher resolution that worked with hardware fullscreen for me was 1600x900.
Only changing the resolution doesn't automatically move the dot to select hardware fullscreen, which I find confusing.

Can you tell the version of Lix and the resolutions you tried and the resolution of your monitor?

The main problem concerning the linker error with optlink is that the '+'  of the path C:\Users\...\AppData\Local\dub\cache\allegro\4.0.6+5.2.0\build\no-libs-debug-BjwtnovUaJZmlnbyKnG51g\dallegro5.lib is not recognized and treated as two lines, with the second starting after the '+'.

Compare:
C:\Users\...\AppData\Local\dub\cache\allegro\4.0.6
 Warning 2: File Not Found C:\Users\...\AppData\Local\dub\cache\allegro\4.0.6
5.2.0\build\no-libs-debug-BjwtnovUaJZmlnbyKnG51g\dallegro5.lib
 Warning 2: File Not Found 5.2.0\build\no-libs-debug-BjwtnovUaJZmlnbyKnG51g\dallegro5.lib

The workaround is to rename the folder, get the linking recipe via dub --vverbose --arch=x86_omf --compiler=dmd and then copy and change the recipe concerning the name of the folder by hand. (For suppression of console add the line "lflags-windows-x86_omf-dmd": ["-L/subsystem:windows"], in dub.json.)

dmd seems to have undergone changes concerning the linking of 32bit binaries. This has yet to be confirmed, but I tested a bit with v2.103.1-dirty.

dmd seems now even with --arch=x86 build 32bitmscoff-builds. Optlink doesn't understand these, so lld-link is used, which is also the linker for ldc.

For reference:
https://dlang.org/changelog/2.086.0.html#dmd-mscoff-default (dub --arch=x86 still uses optlink (-m32 switch for dmd compiler))
https://dlang.org/changelog/2.099.0.html#fix18964 (-m32 now builds 32bitmscoff)
https://forum.dlang.org/post/pvckfcxxntzwzfubkeze@forum.dlang.org (forum topic about incompatibility mscoff and optlink)

Should it turn out to be the case, that dmd now uses lld-link for 32bit by default like ldc as well, then the build notes need to be rewritten. Especially the provided libraries have to be unified to the ldc ones. The dmd ones for 32bit (for the needs of optlink) are then not relevant anymore. Furthermore dub.json has to be adjusted, so that the line '"lflags-windows-x86-dmd": ["-L/subsystem:windows"],' is removed and the flag for 64bit dmd build is used generally for dmd. Maybe no distinction between dmd and ldc is needed anymore.

Forestidia says: WinLemm had two buttons to restart the level:

• Restart (= restart without replay), and
  
• Action Replay (= restart with replay, you can click to interrupt).
  

Even with these two buttons, the replay was confusing. When you see the mechanism for the first time, you don't exepct the action replay at all because games normally don't do this on their own.

My memory was a bit foggy. The restart without replay button wasn't called Restart but Replay Level.

Solution to Devil's Right Hand is different to both lemforum-replay-solutions.

You can untrap with the Win key as well I think.

Here is a version that should work with current Lix and should have all tiles, provided the thinplatform tile is right. The problem is that you don't have variable SI like in the original or c++ version.

This attached version says for some reason $BUILT 2023-02-14 21:09:38. Can you provide another version of the level as well?