Use skill tree to solve one real in-game task.
Open the skill tree after you know which part of the lake loop is failing, then buy the node that directly shortens that pain point. A tree choice should pay off in the very next run, not three menus later.
- Fill until the lake route moves faster.
- Drain until the lake route moves faster.
- Upgrade until the lake route moves faster.
- Spend tokens until the lake route moves faster.