To start out you need to plant the seeds for the flowers to grow. Then you go to the bottom of the screen, there will be a tool bar that will have a packet of seeds, a watering can, and a bag of plant food. You have to give the flowers the water and the plant food or they will die in a set amount of time (it's faster if you got the first beta version). There was a second set of mechanics planned for the game, but I didn't get to them in time due to a major error in a part of the framework I designed and having to build a whole new manager for the flowers themselves. However, I'm adding the second section now as well as tackling some of the bugs and glitches that I know about and adding some quality of life features to that first part as well. Check out the main Itch page if you want to know more, I'm making updates to that page as I get some of these improvements added to the game!!
I'll get to the point where I'll also add a tutorial to the third beta phase too... But that will happen after the jam...