On my pc its a good gaming pc i get like 20 fps at first part of game like when the kings gem gets stolen please help fix

try installing Bandicam and force fps limit to 60 .

• download Bandicam
• open Castle Crashers
• click on FPS
• Choose FPS limit to 60
• Hotkey can be anything

I have used this on emulators that dont end up on 60 FPS . Works like a charm