Mobile game Develop(Snake game)

I have small cool game snake. I wana someone upgrade, add new stuff to my game. What i want from you, design level 10(boss level) With graphic, sound, fightalgoritms. Other stuff: Pause funcion; HighScore Save; APP store publish help; Fix some minnor bugs; Give value for game objects, live, size, time, apples. extra food(for highscore); Optimize old code, control need be without laggs. Project budget i think will be max 200$ i cant pay more sorry people :) I am human with limited budget.