Does anyone have a disk image of the subject they can share, or at least a complete archive available?

All archives posted (Including under archive.org), provide the same cracked package of the game which contains only the CGA version with the file JRPACEGA.EXE missing.

Thanks in advance!

This copy seems to be complete, though I get no images when running the EGA version under DosBox. Please give it a try an let us know if it works for you.

https://archive.org/download/Total_DOS_Collection_Release_14/TDC_Release_14.zip/TDC%20release%2014%2F1988%2FJr.%20Pac-Man%20%281988%29%28Thunder%20Mountain%29%20%5BAction%5D.zip

Thank you! Unfortunately, I am experiencing the same under DOSBox. This screen is blank. The game is running though. There is sound and if a game is started, you can hear dots being chomped.

EDIT 1:
This may be needed: https://sourceforge.net/p/dosbox/code-0/4447/

Touched upon many moons ago in this thread: https://www.vogons.org/viewtopic.php?t=10452

EDIT 2:
Verified. DOSBox SVN r4446 or newer with machine set to EGA should work fine. I tested with SVN r4456 (http://www.emucr.com/2021/05/dosbox-svn-r4456.html) and it works perfectly.

Great info. Thanks!