You have to click the apples that fall down from the screen. After every round, you can upgrade stuff for the next round. There are 3 main upgrades, one to increase the length of each round, one to increase your APA (Apples per apple), and one to increase the size of the falling apples (Apple size). There is also an upgrade tree. The upgrade tree has more unique upgrades that are very different from the main upgrades. For example, the fourth upgrade in the upgrade tree auto collects all apples that touch the bottom of the screen, without this upgrade the apples would just delete. There are also golden and rainbow apples. Golden apples give 5x as much apples as a normal apple. (You can upgrade this in the upgrade tree) Rainbow apples give 20x as much as a normal apple. (You can also upgrade this in the upgrade tree)
~Credits~ Nothing here :) ~Updates~ 1.0 - This ofc added nothing. It has 2 main upgrades and an upgrade tree with 14 upgrades. 1.1 - This update added a new main upgrade that increases the size of each apple to make it easier to click. Also changed the thumbnail. 1.2 - This update added sound effects to a lot of things in the game. 1.3 - This update completely overhauled the UI for the game, changed backgrounds, changed the thumbnail, and even added 2 new things to the summary: Golden apples collected, and rainbow apples collected. 1.4 - This update added a transition when you switch screens like going from the game to the upgrade screen. 1.5 - This update added simple effects for when you buy upgrades, buy something from the upgrade tree, and when you click apples. 1.6 - This update added a new apple type called the crystal apple that gives 100x as much as a normal apple. ~Next Updates~ 1.7 - This update will add new animations for golden, rainbow, and crystal apples. (Probably trails or smt) 1.8 - This update will add a new feature called the apple factory, that will automatically give you apples every second. This will cost apples to unlock and to upgrade it. 1.9 - This update will add a new apple type called the rotten apple that will take away apples when you click it. 2.0 - This update will add a settings menu that will let you customize the game. 2.1 - This update will add a new apple called the emerald apple which will give you 150x times as much as a normal apple. (Every update after this will probably be to continue the upgrade tree)