To begin with, I'd like to point out that the game also contains a native Win95 32bit executable (endorf95.exe), which basically means it can be run even under modern 64bit OS like Vista/7/8/10 directly. At least I managed to launch & play it with my Win7x64 based laptop and I used no third-party utilities to make it work aside from setting a Win95 compat.mode upon its exec.file. Although there's another unfortunate fact regarding its looks - since this game's 1 of those that use low color 8bit VGA palette (256 colors in total), once it goes fullscreen most its colors turn negative i.e. become inverted. Is there any way to work that glitch around - one might ask. Actually, there are at least a couple of solutions available: a) run the game in windowed mode, b) use some external utility like DXWnd or dgVoodoo2 that'll do the trick for you.
So what about the gameplay itself? It's top notch if you ask me! And yes - the farther you advance the tougher it gets, so be prepared to replay later levels over & over & over & over again since no one said it'd be easy in the 1st place, right? Sure thing!!