I often enjoy simple games more than complex games. Grid is the latest time killer that I’ve found and became quickly addicted to.
Grid is a spin off of the old style circuit games where you have to get all the pieces connected in just the right order to form a circuit. The exception is that Grid requires you to connect every connector to some other connector. Each “grid” only has one solution, so you have to get it just right in order to move on to the next level.