Sup. Press space or click away to get out of the shop. You can buy any upgrade multiple times. The cursor upgrades get a bit more expensive any time you buy one, and they each add a bit more to the apples per click. The coins give you more apples, the cursors that spawn give you more apples per click, and the apples that spawn give you more CPS. None of the upgrades in the shop get more expensive.
Made it myself. Version 2 of another one of my projects.