Gridbash 64

A Brain & Logic game something like Q-Bert. Colour the squares with the hammer while dodging the balls, that randomly turn green allowing you to smash them (like in Pacman). You can also transport to the top-left corner of the screen if surrounded by walking off the right-hand side. published in 64 Tape Computing No. 03 (1984 / 08-09) and in Go Games n.13 (October 1986) as Hammer.