Setting the Game Jam theme aside for a moment, I think the core concept—"Large databases consume an enormous amount of water"—is very interesting. It's a topic that many people may not be aware of, and I think your game has great potential to raise awareness about this aspect of climate change.
Your game reminds me of Awaria (https://store.steampowered.com/app/3274300/Awaria/), which might serve as a useful source of inspiration. Incorporating a combat system or leaning more into challenging gameplay could help players better experience the struggle of "battling" climate change and the environmental costs of large data centers. This approach could make players feel the frustration and tension surrounding these issues while reinforcing the conflict between the growing demand for large-scale computing and our planet's sustainability.
Moreover, you could consider adding a simple narrative about protecting or restoring a seed's water source(stolen by the database). That might help tie the game more closely to the "Plant a Seed" theme while naturally supporting the environmental message. (I haven't thought it through in detail. I already like your original concept, and it's especially impressive that you're participating in the game jam even without having formed a team yet. Best of luck with the project!)