Very cool concept, at first I thought the gun was pushing me the wrong way, because when it has no ammo you only get a visual out the back end so it looks like it should push you the other direction. I worked it out though and had some fun platforming around. I couldn't manage to get around the section with the big drop though, the timing was a bit too challenging for me. Neat game.
Thank you for your playing and comments. I would like to share with you an interesting thing. The version submitted on the web page is already a version with reduced difficulty. When it was first submitted, the members of the studio said that the version is too easy you should add another HARDCORE mode.