FL0W3R

Keep your plant alive
Press 🅾️ (Z or C) for watering and ❎ (X) to add some fertilizer

Tip : it takes several minutes for the flower to grow, so feel free to put the game on a corner of your screen while you do something else, but keep an eye on it if you don't want to watch it die too soon!
(But it looks like the game is paused if it stays in a tab in the background, so you'll have to open it in a new window)