Be a happy cloud!
Cloud is a one player 2D game. Where the goal of the game is to match the shape of the passing clouds before they fully pass you.
At first, I was not too sure of what I wanted the game play to be. It was between a experience game without a goal in mind and unlocking skills as the player goes on or a matching game. After presenting I decided to create a matching game. The player will have multiple buttons to choose from and they have to remember what shape belonged to what key. It might be interesting to have the keys change has the time went on but that may be too much for a player. Instead, it can be a memory game. I am also thinking about including funny accompanying word text along with it to add some humor, a score, and time board. Lastly, another idea I have is once you have hit 1o matches there is a rainbow tail that starts to show you are on a roll and once you mess up it goes away. It might be fun to also include some sort of animation on the cloud. Have the cloud start off with a smile and as you continue matching it keeps getting bigger and if you mess the smile changes into a frown and you start to disappear.
I really like your idea of the game. I think your game can make a calming effect on your players because the color choice looks simple, calming, and relaxing. I like your idea of the rainbow showing after you hit 10 matches. It can surprise the players and also makes the players feel accomplished so that they will keep playing your game.