Munch the numbers that obey the current rule, dodge the hunters, and survive each rule swap.
A rule sits at the top of the screen, eat only the cells that satisfy it, such as primes, multiples of a number, or factors. Eating a wrong number costs you; the rule mutates after a warning, so stay alert. Roaming hunters track you across the grid, so survival and scoring run side by side.
Glyph Eater fuses a dot-munching maze chase with number-sense practice on primes and factors, so quick recognition is the key to survival.
Moving around a grid eating only the cells that satisfy a stated rule, while roaming enemies hunt you, is Number Munchers — released by MECC for the Apple II in 1986 and designed by R. Philip Bouchard, who also designed The Oregon Trail.
The original addition is that the rule mutates mid-round after a warning.
That attacks the way the classic is actually played. Number Munchers rewards settling into a single criterion and clearing the board on autopilot; a rule that changes under you means the grid must be re-read rather than remembered, so primes, multiples and factors have to be recognised rather than recalled from the last sweep.
Glyph Eater is an original free browser game from PlayPendium that fuses a dot-munching maze-chase arcade with number-sense practice on primes, factors and multiples. Play instantly, no install.