Needs something interesting
This game is a very exact simulation of what its really like to be at a firing range . . . except that you don't get the same satisfaction from clicking a mouse and making a little burn-mark appear that you get from shooting a friggin' lump of metal and making a big hole appear in the target. BOOM! Hee hee. Since it's impossible to capture that feeling in the game, however, I'd suggest making this one more interesting in other ways - not introduce a story, but at least give levels to the survival mode, where the targets are smaller and you have less time. Or, make the targets move. Maybe even make it optional to have different styles of targets, so that the bullseye is harder to see. Please make some sort of change; this is too good of a game platform to waste.