Username menu in settings [TAB2 NAME USERNAME]

Sound Effects [SFX, MENU, CUSTOM AUDIO OUTSIDE OF EDITOR]

Leaderboard [LEADERBOARD, COINS, SHOP, MULTIPLAYER]

Multiplayer [PLAYER2, LOCAL MULTIPLAYER]

Level Maker [EVENT, LEVEL MAKER, LEVEL, ONLINE LEVEL SEARCHING, CUSTOM LEVEL MUSIC, CUSTOM BACKGROUND]

Powerups & Enemies [ENEMIES, BOSSES, SCREENSHAKE, POWER UPS, FIRE BALLS]

Release [MAC APP, LINUX APP, WINDOWS APP, LONGER LEVELS, ETC]

as always,  put your ideas in the comments, i am a new game developer here!