Terrible. All of the codes are four digits long, with no way to distinguish between them, so you have to keep entering the same codes until you guess the right one. That leads you to another code, which you have to enter everywhere again. Etc.
This game had some serious flaws. 1. Why did I need to attach the magnet to the string to check under the couch? 2. Why is it necessary to click on the magnet and remote after combining them with other objects before using them? 3. The clock was so poorly rendered that it looked like a clue - 11 was written like a bold 1. 4. Winning the game AUTOMATICALLY opens a new window?
I would have liked to see one more ending - a very short one, where you "accidentally" kill the customers at the beginning with a horrific choice of which potion to give them.
I'd really appreciate the ability to gray out clues when I feel I've used them to their full potential. It'd really help to cut down on the visual clutter later in the level.
My go-to app when I want to play a similar game is "Hungry Cat Picross." A feature they have that I really like is the ability to test hypotheses. You click a question mark button and you can mark whatever you'd like without committing to anything - that way, you can see what would happen if you were to fill in a square and find out if it would end up impossible later. That way you can choose to "confirm hypothesis" if you want and fill in all the squares you just added testing.
Beginner's guide: Click on each of the totals for the row and column. It'll tell you how many the current total is and what you're going for. If there are any numbers that are HIGHER than the difference, they must be part of the solution. Click-and-hold those so that they are locked and you can remember to keep them.
Do that for all of the rows and columns. Then repeat for any numbers that can't be used to equal the difference needed. For example, if you have 28 and you need 20, you need to get rid of exactly 8. If the numbers you have left are 4, 4, 4, 3, and 2, you need to keep the 3 and the 2. If you got rid of them, that row would be unsolvable. Lock them down.
Keep repeating and you'll be in much better shape than just guessing.
 "Secret Door Escape 3"){kind=icon}
 "THINK OUTSIDE THE BOX"){kind=icon}
 "Secret Door Escape 2"){kind=icon}
 "Antaria Online"){kind=icon}
 "Platform Maniac!"){kind=icon}
 "The Alchemist"){kind=icon}
 "Exit/Corners"){kind=icon}
 "F.H. Memento: Playground"){kind=icon}
 "Reaper of the Undead"){kind=icon}
 "Pixoji"){kind=icon}
 "Spidle Tridle"){kind=icon}
 "Big Tower Tiny Square"){kind=icon}
 "Zak"){kind=icon}
 "Solar Garden"){kind=icon}
 "Bobo's Trouble"){kind=icon}
 "Mine of Sight"){kind=icon}
 "Rullo"){kind=icon}
 "Midnight Hunter"){kind=icon}
So does that happen every time you refresh?