Spanwright
Build a seven-section river crossing (shown top to bottom) around the permanent island at section 4. You have four wood decks (capacity 1), two steel decks (capacity 3), and two braces. A deck must grow from either bank or an existing neighboring deck. A brace joins the tapped section and the next numbered section, adding 2 capacity to both; it cannot touch the island. Test sends two different trucks across one axle-step at a time: first front 2/rear 1, then front 1/rear 3. Each occupied deck must support its axle. Plan for the heavier return axle, not just the first truck. Undo construction before testing.
Controls & scope
Tap the board or named controls. Tab and Enter/Space operate buttons; R restarts. The game-specific failure conditions are described above; terminal results lock input until Restart.
This is an original compact mechanic study, not a copy or full reproduction of the reference game. Research and scope are documented in README.md.
Original code & procedural visuals · Private local collection