Game design ideas

My game idea is to make an arcade style shooter where you play a tank which can move horizontally and shoot up at planes which fly back and forth at random height and speed dropping bombs at you. Points are scored for shooting planes.

If I have time I will add some more features such as:

• Power ups
• Faster shooting - allows you to shoot more quickly
• Multiple shots - each shot shoots a 3 shot burst
• Smart bomb - kills everything on the screen
• Invulnerability - you cannot die for a short period of time
• Advanced enemies
• Heavy bomber - drops multiple bombs
• Paratroopers - float slowly to the ground and kill you if they make it
• Kamikazi - flys fast at your tank and kills if it hits
• Boss - takes multiple hits and shoots homing missiles