Supraland

To bring water back to your people you need to defeat the final boss.
Your weapons don't harm the final boss.

You need to turn him Orange and get the purple flies to eat him.

Change Color Dispenser to Orange = Shoot your gun through Lava.

Super Charge Color Changer = Force cube on button to turn on power, translocator ball between conductor and pipe to allow electricity to reach color changer.

Activate Color changer = Allow Boss to fart on you to turn you green then avoid water and travel through ring (look down to see what color you are)

Get flies to Boss = Have them follow Force beam to jump pad, then pick up translocator ball and move it through beam to turn it purple. Attach flies and launch.

Credit: Game Guides Channel