Arm a lane. Let a ground-level trip become an upward spring.
Tap a lane, press 1/2/3, or use left/right arrows to select it. Tap the action button or Space to arm its gumfoot. A trip releases the upper spring automatically.
Touch and keyboard supported · Gameplay stays ad-free
By Rafael, WebTug creator · Updated September 7, 2026 · Source-linked learning
What the game helps you notice
Gumfoot lines connect a cobweb to the ground. A weak ground attachment can release when prey trips it, letting energy stored in the upper scaffolding lift the prey into the web.
Where does the upward energy come from?
From the preloaded supporting web. The ground attachment acts as a release point; it does not create the energy.
A game inspired by science—not a biological simulator.
The three lanes, arming button, and recharge timers make a strategy game. The upper spring is a simplified stand-in for a distributed cobweb, not energy stored only in the gumfoot strand.
Try this experiment: How does energy loss change the lift?
Keep stored energy and scaffold stiffness unchanged. Compare two energy-loss settings after the ground connection releases.