Hey there! I really liked this game, and here is an idea of mine to maybe implement a second boss.
This second one is a pirate-ish looking mask, and with him three new chest items are available:
- Hook: "Steal one of the Dealer's items."
* You have plenty of time to choose an item, but you can't use it immediately.
- Coin: "Flip the coin, and decide your bullet's fate."
* If it lands on Heads, your next shot deals one extra damage (could possibly be combined with Hand Saw for a 3 damage shot), if it's Tails, your next shot deals no damage (but this effect doesn't make you play one extra turn).
- Bottle of Booze: "Successfully shooting at the Dealer gives you an extra turn."
* It has to be a live round for the effect to trigger.
By the way, in his boss battle when he reaches two health:
A spinning wheel rises up, lifting the shotgun. He spins the shotgun, and this happens:
* If the tip of the shotgun aims at you, a wave appears from the left/right, cleaning all your items.
And the wave clears his items if it aims at him.