Happy Cups - Fill the Cup is a free game available on the iPhone platform. Developed by Dan Li Chen, this game falls under the Games category. The objective of the game is to fill up the Cup with juices by drawing a line and make it smile again.

With a dynamic mechanism, players are free to draw lines to complete each level. The game offers simple, smart, and fun puzzles that can be both entertaining and challenging. Players are encouraged to think out of the box and come up with their own solutions.

Happy Cups - Fill the Cup currently offers a wide range of levels, with more to come in the future. It is considered one of the best casual games, providing an enjoyable experience for players of all ages.