People will not fill in your form.
They will spin a wheel.

The code is open. All of it.

No minified bundle, no licence key, no call home. One HTML file you can read from top to bottom. This is the entire thing you edit to put your own prizes on the wheel:

• One line per prize. Two labels for the sector, a title and a sentence for the popup.
• The weight decides the odds. Bigger number, more often. Your expensive prize stays rare.
• Nothing else to touch. The geometry, the angles and the odds all recalculate on their own.

// change this, and the wheel is yours
const PRIZES = [
  { l1:'−20%',  l2:'any order',
    name:'20% Off Your Order',
    desc:'Valid for 72 hours.', w:22 },

  { l1:'Free',  l2:'delivery',
    name:'Free Delivery',
    desc:'On your next order.', w:20 },

  // ... and the jackpot, kept rare
  { l1:'−50%',  l2:'everything',
    name:'50% Off Everything',
    desc:'One order, half price.', w:4 },
];