Good and challenging puzzles

The design is a bit clunky but the puzzles are great so whats the difference. Ive had it for a couple of years and I still play every day and Ive got lots of puzzle yet to try. Come to think of it, Ive probably spent more time in this app than any Ive ever owned.

FirpoDog about 100 Logic Games - Time Killers, v1.39.3