The game uses the sprite palette from X1 here, which doesn't fit with the new password digits the correct palettes are stored in the ROM from 0x02C9A0 to 0x02CA1F and are identical to the four palettes in the later prototype. This early password screen has its sprites set up like the screen in the first game - complete with glitched Metalls - but the graphics are new and they were already planning to expand the grid from 4x3 to 4x4.
Use Pro Action Replay (PAR) code 7E003C01 on the title screen and select "Game Start" to access it. The password screen is normally inaccessible in the early prototype. These demos were likely recorded for the Summer CES 1994 build (which only featured the intro and these two stages), and as a result the demos no longer sync up with the layouts in either prototype: for Morph Moth, the desync occurs at the Old Robot fight's entrance, while in Wire Sponge's stage, the desync occurs in the first Sole Solar area.
Additionally, experienced coders can take advantage of its built in scripting language, "GML" to design and create fully-featured, professional grade games. It features a unique "Drag-and-Drop" system which allows non-programmers to make simple games.
GameMaker is software designed to make developing games easy and fun.