378! I really liked discovering small optimizations while playing the game: You don't really have to release Z unless you want to move away from a plant, you can press down to go to a lower level from anywhere and don't have to use the ladders, you can go and refresh the shears as soon as they start blinking and don't have to wait for them to disappear (thanks for this xD).
Really cool to see a TIC-80 game, too!