This game is infamous because it’s one of the worst games ever made. It’s full of all sorts of glitches and it’s extremely hard because of it’s glitched gameplay. The game couldn’t even be finished.
Now, you can play with all those bugs fixed so the game can be completed with no problems. No more enemies disappearing, all levels load correctly, and no annoying level number glitch (levels 4, 5 and 6 were called level 3).