Zoom!

Zoom! is a puzzle game developed and released by Discovery Software in 1988. You control - Mr Smart - whose mission is to save the Earth from alien invaders by painting a grid on the game board. Rolling along the grid lines changes their colour, and when the grid cell is completely surrounded by coloured lines, it starts to flash. The level is completed when all the cells on the screen are flashing. You must avoid enemies and collect various bonuses: sweets, which give you extra points; bananas, which slow down some enemies; clocks, which freeze all enemies for a short time; and the sun, which makes you temporarily invulnerable.