A little bit more info. I would like to explain the three game modes.
First there is the 'Analysis & Interpretation' game mode. In this mode, you will examine various elements from the painting and you will receive a description that will represent an analysis of each particular element from the painting. These descriptions could be related to the painter's style or to the story depicted in the painting, etc. In this game mode you can also simply enjoy the paintings while you explore/examine it.
Once all of the important elements are examined, you will be asked to tweet your interpretation of the painting. This will be used in the 'Guess the Painting' mode.
The second game mode is 'Test Your Knowledge' and as its name implies, it will put your knowledge of famous paintings to the test. This game mode is very similar to hidden objects games, in that each painting has added (or missing) elements that you will have to spot.
The last game mode is 'Guess the Painting'. In this mode I will take people's interpretation (which they tweeted using the ColorsOnCanvas hashtag) but I will also add some myself and from them, the game will randomly choose one and show it to you. You will then have to guess the painting that matches the interpretation/description. I might implement a score system, depending on how many times you guess/fail to guess.
I will soon release a short demo featuring a beta of the 'Analysis & Interpretation' game mode of Paolo Uccello's Saint George and the Dragon. You can also reach me on twitter: https://twitter.com/mihaipuiucernea