Where did the effort go?
a number of points why this is bad.
1) poor graphics, highly repetative.
2) nothing more than shooting, which on my computer doesn't work.
should you make a game, you realise that if I press spacebar I should shoot. now I dunno if I was shootinng or not but after 3 tries I only managed to shoot one plane down, and TBH, i was clicking like mad on one plane just to try.
3) poor sound, that explosion is repetative and static, sounds crap.
4) unoriginal, I don't want to shoot planes down.
5) too basic, get some levels, powerups, maybe a little movement, and try to make it so you can see your bullets shooting, have some ammo, etc.