GNOG is yet another puzzle game whose main focus is its visual style. A visual style so unique and quirky, it made me think the puzzles were more difficult than they actually are.
Early on you solve puzzles by trial and error, until you figure out how the puzzles work. From then on you go through a checklist of "what can I interact with", mess around with the simpler puzzles, and keep an eye out for solutions to the more complex puzzles you'll encounter.
If a puzzle seems only solvable by trial and error/brute force, there's a solution to it pasted somewhere on screen.
It does become more annoying and challenging once you can no longer jump between puzzles, but attention to detail and some trial and error will get you through it.
It took me three hours and change to finish the game, with some puzzles being a breeze while others were more difficult.
Regardless, the ending seems to have come out of nowhere, since I didn't track how many puzzles I had left
Frankly, I could have played a dozen more.
The main gripe I have with this game is that it never gave me a sense of achievement. Most puzzles are either solved by trial and error or by spotting the solution on screen, and the few that aren't, are too quirky for the outcome to actually bring me any enjoyment, or a sense of achievement.