Inside did a marvelous job of virtually never putting me in situations where I knew how to solve a puzzle, but couldn't quite execute on the solution. The game feels honed and heavily edited, with each mechanic used only as long as it's interesting to do so. It's a lean, efficient, almost entirely non-repetitive experience, and each of its puzzles has something new to teach.
The game is full of moments that feel truly handcrafted — it's not the longest game in the world, but it's packed with countless memorable set-pieces that I remembered with perfect clarity my second time through.