This game "Potato Clicker" by jdneal2 is a stress-relieving mini game that focus on the most simple and direct form of interaction: clicking.
Interface
The interface of the game is also very delightful, I believe that it is very suited for a mobile stress-relieving game too. A big potato at the center that gives the players a focus, surrounded by 2 potato shaped fries that adds some movement and style to the game. The upgrade menu is on the top of the potato, and the detail of the upgrades will arise below the point counter at the bottom of the screen, so that all of the empty spaces were adequately used. The colors of the interface is also properly used. The background color of the potatoes is a grey color that is frequently seen in fast food restaurants, and the potatoes might look more tasty with this color. The background color of the upgrade menu is crimson, probably because it has to be a comparison with the grey color, but also be a warm color that fits the theme of the rest of the game. Another detail that is worth noticing is the font of the point counter and the upgrade information. The font is a cartoon style font which has cow-like spots on them, which looks good in the whole scene.
Gameplay
The gameplay of this potato clicker game is quite the simplest thing at first. The only thing I do is click the potato in the center, then the big potato shrinks while being clicked, and the potato points will be increased by 1. Without the upgrades, the game will be a pure click counter, and the upgrades successfully added an interesting gaming experience to the game. My expectations for the upgrades in an ordinary games would be it makes the game a bit easier, but I would still think the final goal, which is getting 100000 points for the moustache, impossible to accomplish (before my patience run out). But the upgrades in this game breaks the conventional idea and are incredibly strong. The first upgrade adds 5 points per click, so the speed to get points is actually accelerated by 6 times. What's more, the upgrades in this game can be purchased again and stacked. The second upgrade can turn the game into an automatic afk game by giving the player a cursor that automatically clicks the potato, which can also to stacked 3 times at max. After purchasing the two upgrades several times, the player can see the points are increasing for over 10,000/second. Buying a moustache upgrade would not be a problem after only several minutes of gameplay, and in most time the player don't even have to click. Finding out that the upgrades can stack is the most wonderful part of the game experience, and the smartest design was to hide the information of it and let the player themselves discover this fact.
By the wonderfully designed upgrades, the game turned a repeating clicking simulator into a surprisingly fun experience.