This game took around 53 minutes to beat. Check out Angelostar88's no death run on hard mode. I used his technique of uppercut and ground pound combo for most of the game. It works on all enemies and bosses. The final level can be tricky because of the gun enemies and the fat fuck with the stick. He was the only boss that gave me issues and appears twice in the game. He can basically kill you if he gets you on the ground. So its best not to get hit by him at all. The technique is the same it just has to be done quickly and without getting hit by him.
This game has unlimited continues and starts you at the beginning of the stage you got to with 3 lives. Unsuccessful continues were edited out.