Possibly not exactly matching the required criteria
Flag Catcher, a little Amos shareware game, well at least a catchy tune
https://hol.abime.net/5578
i have tried to cheat using savestates, to try to reach the end, but the game itself was probably never intended to have one
it crashed in guru after a specific level (36 or 38 iirc)
consider that normally you cannot go after level 28, 29