Agent A is a puzzle game. Each room is a static picture where you tap to get closer and examine an object (and if it's not a significant object it'll give you a message so everything you can examine is important). Double tap to move back to previous room and the navigation works well.

Many puzzles are of the "find an item and use it here" variety. Other puzzles are you have to set knobs correctly (e.g. a series of numbers/symbols/colors or a pattern) and the solution, or parts of the solution, are scattered in other places. There are a few standalone puzzles (e.g. one where you have to slide a block from one side to the other moving other blocks out of the way) but mostly it's one of the previous two.

It has pretty graphics and some amount of voice acting for the two NPC characters. Dialog is a bit cheesy and since the puzzles are not that complex I guess this game is aimed at a younger audience.

My 2016 review of Agent A. Back then there were only three chapters done and I found it a fun game. I replayed this again from the beginning and after 3-1/2 years I still new most of the solutions, though still had to pay attention to find all the hidden objects to advance.

Chapter 4 and 5 are a big new area though I like that you have to return to the house of chapters 1-2 to solve a couple of puzzles.

Overall it's still a very entertaining experience.