A short sample game to show how to use Kivy.
Colours is a game in which you have a board, filled with blocks of different colours. You can switch the position of two blocks - if a group of multiple blocks with the same colour is formed, those blocks disappear and you get points.
How to play
Click on a block, it'll get highlighted. If you now click on a different block, those two switch positions. If you create a group of blocks of the same colour by doing so, the blocks disappear, and you get points. New blocks fall down. If you don't create a group, you get a "miss". 4 Misses and you lose.