This game has unused graphics.
This game has a prototype article
Like a lot of other late 90's DOS platformers, Guimo fell into obscurity hard and is hard to come across. It's notable for being one of the few Brazilian DOS games.
Most of the enemies have unused death animations.
Judging by the position of the frame, this would have been used to smooth out the shooting animation, but the frame was never finished and/or it may have made the animation take too long.
This animation would presumably play out when deploying an Eggy Robot, but a particle effect is used instead.
Much like the death animations, the set of platforms in Orongo Falls that lead you to a few power-ups originally had a falling/disintegration animation as opposed to the particle effect.
It appears an additional cheat, FLASH, was to be entered when the game was paused. As it is, it doesn't appear to do anything.