Of the three versions of Kokotoni Wilf released by Elite Systems, the Commodore 64 version is arguably the worst.
Compared to the Spectrum original, Amstrad Kokotoni Wilf is pretty ugly. The developers have chosen a dark blue background with green caves, and the odd splash of colour in the (very flickery) sprites and landscape decorations. The graphics are very poor in my opinion.
A leading contender for the game with the silliest name of all-time, Kokotoni Wilf is an early platform action game with you in the role of the titular Mr. Wilf.