A Game About Squares is a pretty neat minimalist logic/puzzle game. It’s pretty easy early on but some of the later levels are challenging. The jokes between levels can get a little annoying, though.
It does a pretty good job of slowly teaching you the concepts you’ll use later on. The only problem I found was that right off the bat, it wasn’t completely clear. You click on the square to move it in the direction of its arrow, and you want each square to get to its color’s circle.