The lighting effects are great! Personally, I didn't mind the movement. It's like rowing in Minecraft, you just kind of always use forward and then you use the mouse to steer. I'm so squishy though...dying comes super easily haha! I saw that you asked for suggestions, the biggest thing I'd love to see is armor pickups in the beginning! 

I got stuck with a "investigate before going further into the jungle" but I don't even know what I was looking for that I had to investigate... If it was because I must kill everybody in the area, it wasn't clear enough and I believed I had killed everyone until I went waaay back to the beginning and there was a guy there. Then I died with a single shot.

I also have to always be pressing against a barrel to pick up the fuel, it feels like it could give me a bit of grace and allow me to already pick it up when the message to pick it up is showing.

I suggest adding a health system to the main character, and give the player the option to navigate with AWSD (that's just a preference thing when I'm not using a joystick).

The ambiance is very nice. Good use of the art and SFX.

One more thing is that there are some pretty big gaps between rocks that I'm sure the character could fit through but doesn't, and that frustrates me a bit while trying to navigate xD More obvious blockages would be nice.

Overall fun!