Nice and simple, you did a good job making everything clear and readable. I do think using the mouse to control the game breaks the rules of the jam though. Maybe a better solution would have been to have a player character (Or watering can) that the player controls with the arrow keys? Would open you up to add things like obstacles for the player to avoid.
I think the shaders you used (The CRT and the chromatic abberation one) are pretty strong and distracting though. I appreciate you adding the option to turn off the static. Out of curiosity, did you use the "VHS and CRT monitor effect" by pend00 on Godot Shaders? I've used that one in a bunch of projects.