Hey, I recently checked out
https://fishing-slots.com/ and tried a fish table game in demo mode to learn mechanics. Yes, you pick the ammo (cartridge) strength — weaker ammo for small fish, stronger ammo if you aim for big targets. You need to shoot when fish pass by and timing matters. The demo helps a lot to get used to controls before betting. Once confident, you can switch to real bets or stay in practice mode to polish your aim.