Lumber Valley Math

Create a 3D isometric lumberjack math game using Three.js. The player walks around a low-poly forest with WASD, chops trees with SPACE to drop logs containing random numbers, and collects them with E. Place workbenches where players open a crafting panel to combine two collected numbers with an operator (+, −, ×) to hit a target number. Include progressive difficulty levels, score tracking, particle effects on chop and collect, tree respawning, camera rotation via mouse drag, a full HUD with resource counts, and a cozy dark-forest color palette with gold UI accents. Ortho camera, shadow mapping, fog.