And I am only at world 3, so relatively early on. Even the early levels doesn't pull any punches, which was very surprising, not many puzzle games do a diff curve this steep, it does get quite difficult very quickly. Even a world 1 level got me stumped for an hour, and I don't expect the levels getting any easier going forward, so I'd only recommend Ligo if you are looking for a serious challenge.

The base mechanics are easy to understand and fairly simple, yet they do so much with seemingly so little. It is a sign of elegant, expert puzzle design. Even if the levels are difficult, they are fair and never feel overcomplicated.