In Wizball, you play as a wizard, who takes the form of a strange green ball. His objective is to "paint" the game - Every level starts off in drab, grayscale colours, but by collecting colour droplets, he will be able to recolour everything until it's fully coloured.
The game has rightfully earned a high spot in the top game lists of many C64 fans - It's very fun to play, the gameplay is unique, and what music there is is great.
It's also noteworthy that this is the first game originally developed by Sensible Software to be on its way to VC - Sensible Software was one of the largest UK videogame developers and made many great games across a variety of systems. Here's hoping for more!