I was busy the past few days so I just started work on my naval combat based top down shooter game. In about 5 hours of work, I have implemented
basic player movement
gun types(canon, machine gun)
ship with destructable enviroment
particle efffects for a moving background and a trailing effect for the player's ship
music
to implement
enemy AI and ship
wave /difficulty system
main menu
possible implemenation
boss after a few waves
ammo system