Ok, thank you very much

Thank you / Díky

Yes this should be right. You can try run game directly
java -jar Postak.jar

Dialog is only for get player name and settings (music, sounds and fog).

Hi, for my maturita project I'm working on arcade game in Mario style called Pošťákův týden. Main character is postman and you have to collect the letters which were stolen by Požirač balíkový (Package Eater) and Požírač dopisový (Letter Eater). You can download it here http://www.postak.masteride.cz/ or here https://sourceforge.net/projects/postakuv-tyden/.

Ok. Thank you

Yes, the bounding volume

Hi, please, is there any chance to show the collision area?