I enjoy how much atmosphere you managed to create with so few things. The use of sound and music was excellent (though I rated them low to reward those that made their own), and the minimalist yellow color palette highlighted the green plants well.
The core gameplay loop could use some ironing. Each time the player has to journey further from the base camp, meaning they can bring in less water as a function of time. Since the plants seemingly consume more water than they produce, this means that the player's garden seems to inevitable wilt away. There was also some acceleration at the starts and ends of movement, which didn't feel great to me.
It's a strong idea, and you nailed the aesthetics. Just keep working on gameplay and you've got great projects ahead in your future!