1. Choose chance. The slider sets win chance 2–98%. Multiplier = 99 ÷ chance (that 99 is 100 minus the 1% house edge).
2. Roll under / over. Under wins when the roll lands below your target. Over flips the winning zone to the top of the range.
3. Demo first, on-chain later. This build lets anyone open the page, connect Phantom, see a real balance, and stress-test the game loop with demo SOL before any program is deployed. Betting never touches real SOL in phase 1.
Phase 2 — full on-chain. Next step after testing: an Anchor program with a house vault, bet instructions that lock SOL, and verifiable randomness / seed commitments settled on-chain. Then this same UI switches from demo balance to real devnet bets, then mainnet — and shared chat and real deposits/withdrawals unlock with it.
⚠️ This is a testing front-end, not financial advice and not a live casino. Don't send real SOL to any address shown here for betting in phase 1. This page never asks for your seed phrase.