Ok, basically a short and simple escape game, pretty much standard.
Unfortunately the game can not be adapted to local lightning conditions so there are some dark spots. Example is the search for the O. If you don't play this in complete darkness close to the screen you won't even see anything happening after you solve the puzzle. I thought maybe something changed on another screen? I needed a walkthrough and had to watch it twice to guess the location I had to click. After that I switched the lights off and could actually see what happened. This can be very unsatisfactory.
There are some items that are extremly hard to see. I ended up doing the classic pixel hunt game. For me that's always a fail in a point and click game when it comes to that.
On the other hand there were many puzzles that were all right and with logical solutions. So, you are on the right way and I think the score could have been much better if you took a bit more time to polish the game before posting.