🖌 Brush — freehand drawing (pressure via speed) 🧹 Eraser — erase with transparency ╱ Line — click+drag for straight lines ▭ Rectangle — draw rectangles ○ Circle — draw ellipses 🪣 Fill — flood fill connected area 🌫 Spray — airbrush effect ↩↪ Undo/Redo — last 20 actions 💾 Save to localStorage 📂 Load from localStorage ⬇ Download as PNG file