Indeed, you do have to wait for five days. However you can close the game, it will still count the spent time (even when closed). It's like a very basic tamagotchi in some ways :D. Basically, all you need to do is to start the game once a day to water the flower, and then you can close it. I explained that on the description page but it seems that it doesn't displays on the entries page, I'll add a screen explaining it at the start of the game. Thank you for the feedback :D