Trog

Trog! (Also known as 'Og') was the second game Dave Parsons of Confused Pelican wrote for the Amiga. It was a fairly short, sideways-scrolling game in the Wonderboy style. It used pixel-perfect collision detection routines and ran in 32-colour mode. He revisited it later and made a much more colourful AGA version which had 64 colours, much smoother sky colours and screen fades, and a 1-bit parallax background layer. Outside of the game itself, it's really not very polished, and has pretty awful music.