This is my first TAS.Contra has been my favourite game since childhood,so decided to make a TAS of it.Hope it's not too late ;)
1>Using double floor jump in level 3, saved much of frames,though i lost some.
2>I used spread gun from level 5 onwards.
3>I preferred killing enemies and objects somewhere,rather than not to be.
4>Thanks to soig & zyr2288.
Noxxa: Hello emi3d, and welcome to TASVideos. Unfortunately, your movie appears to be suboptimal, as it loses several seconds compared to the currently published pacifist run of this game, which also only uses one player. For this reason, I'll have to reject your movie.
Better luck next time!