Press "O" to open the shop and "C" to close it. (you may have to press 'O' twice) You have to collect crops by tapping on them until you get the upgrade! Press space (ONLY IF YOUR CROPS ARE FROZEN!!) to get the first row of crops! (plus, if you have nothing, you can't just press space to get crops faster) PLEASE TELL ME IF THERE ARE ANY BUGS! I can probably fix it Enjoy :)
Thanks to @ComplicatedCodes for making Farming Interactive 1-3! @Supercell for making Hayday, a game that is free on mobile! (I'm not advertising Hayday btw)