Probably the best Contra tribute here
The really cool thing about this is that at first you think it is going to be a tribute made using sprites. While I have nothing against sprites, this is still way better than any sprite tribute. It sets itself apart from other stick flashes because the characters move with more dimension. Some better parts include the CGI-looking cannon. Even a fan of Contra has no idea what is going to happen next, like the shadow monster appearing. The way the villians are shown in green silhouete is another cool and original thing.