Players can unlock a permanent investor boost by navigating the Sell Lemons sewer maze, a hidden underground labyrinth that rewards a meticulous traversal of doors, levers, and keys.
Entering the Underworld
The sewer lies beneath the Sell Lemons map. A player simply steps onto any street manhole and drops into a grid of four lanes intersecting a central leaderboard. From this point, every corridor hides a door or lever awaiting discovery.
Door Types and Configurations
Four door colour sets govern access throughout the maze. Red doors appear in eight total: four standard openings and four inverse closures that shut when their matching lever is activated. Blue doors number four, with three operating normally and one inverted counterpart. Green doors total seven, split between four standard and three inverse panels. Purple doors dominate with five viable gates, two of which respond to inverse lever pulls.
Lever Placement
Levers mirror the maze’s compass: a red lever in the northwest, a blue lever in the southeast, a green lever in the southwest, and a purple lever tucked in the northeast. Each lever toggles the state of all doors sharing its colour, allowing the player to alternate between passable and blocked passages.
Securing the Sewer Key
A two‑step process unveils the Sewer Key, the key to dismantle the Hanging Vines gate and claim a half‑hour instant income bonus.
- Pull the blue lever in the Northeast maze.
- Pull the red lever in the Southwest maze.
- Pull the green lever in the Southeast maze.
- Unpull the red lever in the Southwest maze.
- Unpull the blue lever in the Northeast maze.
- Pull the purple lever in the Northwest maze.
- Pull the red lever in the Southwest maze.
- Retrieve the Sewer Key in the Southwest maze.
- Use the key to open the gate.
Unlocking the UFO Key
The UFO Key grants a permanent +2 % cash‑per‑investor boost. Its route mirrors the sewer key path with subtle variations that lead to an encounter with an alien NPC named Frunkolapaglorpikisheraphrim.
- Pull the blue lever in the Northeast maze.
- Pull the red lever in the Southwest maze.
- Pull the green lever in the Southeast maze.
- Unpull the red lever in the Southwest maze.
- Pull the purple lever in the Northwest maze.
- Pull the red lever in the Southwest maze.
- Unpull the green lever in the Southeast maze.
- Unpull the red lever in the Southwest maze.
- Grab the UFO Key in the Northeast maze.
- Pull the red lever in the Southwest maze.
- Pull the green lever in the Southeast maze.
- Talk to Frunkolapaglorpikisheraphrim to receive the permanent benefit.
Rewards Overview
- Cosmic Cash Vine – Grants 30 minutes of current income instantly; unlocks after completing the Sewer Key route and opening the gate.
- Cosmic Farmer – The alien character Frunkolapaglorpikisheraphrim; freeing the trapped entity adds a flat +2 % return on every investor when the UFO Key route is finished.
- Good Samaritan – Marks the successful completion of the UFO Key challenge and preserves the permanent boost.
FAQ and Quick Tips
How do I access the sewer map? Stand on any street manhole on the main map and descend into the underground area.
What is the most valuable reward? The UFO Key provides the most lasting benefit, enhancing all investor payouts.
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