Welp. It's got a few gamebreaking flaws.
1. When you have someone looking for 35 different things over the course of 5 or 6 screens, MAKE THEM EASIER TO FIND. Most require lucky clicking or putting your face to the screen to find it. I gave myself a headache. Make them stand out slightly more so that people can find them that don't know the game. It would help to have a hint button for people that need the help where it shows you what letters are still on the screen you're on. Even then it would have been easier to find the letters.
2. The yellow box is broken completely. I got all the numbers and tried to open. It flashes red like I got it right, and I know I did because it's the same number hatsune miku says, but it won't open. I tried hitting just about every button but it doesn't help. The number is either wrong, or the box is broken. That wasn't the only one. I tried the white one and it wouldn't let me claim my prize until I got all the letters. I got the letters and tried it again and it worked, but with the door, i was able to put in what it was even though I didn't have all the letters at that point.
3. There's a sound option but no music? That needs fixing.
4. Some things were confusing, but I think that may have been me not thinking critically enough. The safe with the math problems gave me a migraine trying to figure out your formula. I felt stupid once I figured it out though.
I can't believe I wasted 2 hours on this. Although I will give you brownie points for the artwork. I found myself staring at the artwork more than anything. But this game REALLY needs fixing.