Stuck on a wave, hit a bug, or just have a question? You're in the right place.
Fully close the app (swipe it away from your app switcher, don't just background it) and relaunch. This resolves the vast majority of stuck-state issues.
Check your phone's physical mute switch, and confirm Sound Effects / Music are both switched on under Settings inside the app. Tapping anywhere in the app once also helps — iOS sometimes needs an initial tap to fully enable audio.
Open Settings inside the app and tap Restore Purchases. This re-links a prior purchase to your account if it didn't apply automatically — common after reinstalling the app or switching devices.
Leaderboards use Apple Game Center. Confirm you're signed in under Settings → Game Center on your device, then relaunch Talon Strike.
Please tell us exactly what wave you were on, what you were doing right before it happened, and what device/iOS version you're using — the more specific, the faster we can track it down.