Drip 2: The Sequel -C64-

 by Vector5 Games

Drip 2: The sequel is a game with 15 mazes. You must move along the pipes of each maze and rust them to fill the areas and advance to the next maze. After completing a maze, you'll get a code for the next maze.

Every 3 mazes completed will entitle you to a bonus round where extra drips can be won.

Download, here

Source: https://vector5games.itch.io/drip-2-the-sequel

The game contains 4 different maze types: ice, acid, fire, and bacteria.