Difficulty - easy/medium (Java swing 2d games xp) and extends

SnakeGame.java 9 lines. - method for game found here:

https://textbin.net/ig3kolbjqh

SnakeFrameView.java - 18 lines: Found here

https://textbin.net/lgbfoxqvhb

SnakeGamePanel.java - 78 lines found here:

https://textbin.net/d8lhitjcjo

, then

Goal: Simply to get the game's box to open. It wont open (i use intellij but u can use whatever). Please assist me to simply open up the game's box

I've added all classes/methods i think i'll need. but i cant even get the little window to open sadly. I think i'll be good with the rest if i can please have ur help with this stage. I have 1 big class the rest are small to help. it might look a lot but please bare in mind i havent started the actual game yet.