Improvement WILL come
The reason i give this game a 5 is cuz it haves a few missing things and a few things that are just horribly wrong first you should have made new robots coming in earlier and the function to choose weapons buy them in stores at end of level or an another way to get them. To improve the quality of the game and make something original of it that is good and that people want to play you should have give the caracter the possibility to duck for enemy fire throw grenades and things like that but you didn't i did like that bullets actually fly in this game but aiming just doesn't always work right i don't know why but you could have done that better.
But the game is pretty nice and i am quite critical now but keep up working like this make your future games on a way that you really feel involved and i shall enjoy playing them.
(Btw the headcharacter is a lame ass Rambo look a like shoots even more then him and his haircut was an AWFUL mistake jeez that really ruined it)
Good luck BIC