You are Rambo, but rather than shoot everything, you walk past as much as you can, since nothing can turn around to hit you back and sometimes aiming can be tricky when you only have 5 directions. There's the neat exploding arrows for when you don't feel like aiming but have less of a range to them. Sometimes enemies can spawn in shooting, so you always need to be ready to dodge, which can be tricky when you slowly move in 8 directions. Grenades can be incredibly dangerous especially at the end of level gates, so be careful!

Just remember what Rambo once said: Keep Moving Forward!
At least I'm pretty sure that's what Rambo says idk I've never watched a Rambo film.