The biggest addition are the weapons. In Endless mode, weapons are purchased from shopkeepers and change up your default attack in interesting ways. The bow lets you deal with distant foes, while the battle axe or warhammer is more effective at dispatching enemies up close.
Weapons are also available in the game's ten new levels, which drop you into a trap-filled temple and introduce unique mechanics.
Rust Bucket is free to download on the App Store and Google Play.