Rules: Get closer to 21 than the dealer without going over. Aces = 1 or 11, Face cards = 10.
Interactive Mode: Bet, then Hit/Stand/Double Down (if 2 cards). Blackjack pays 3:2.
Simulation Mode: Computer plays all players with random bets and personalities (safe/normal/risky).
Press Next Round (or Space) after each round. Restart to start over.
Keyboard shortcuts (interactive mode): H - Hit, S - Stand, D - Double Down, Space - Next Round (when available).