Thanks for trying the game! If you decide to circle back:
(1) You can try skipping the level with “]” and see if you can discover the missing mechanic in stage 3.
(2) Or, an optional hint / solution for you:
Hint
The missing mechanic aligns with the theme of the jam
Full solution
When you make a loop with the hose, it makes a kink and changes the water pressure. This increases the spray distance so that you can reach the fire in stage 2 without trapping yourself.