I've just finished the game without switching weapons, I totally forgot that there were other guns until I read the comments. Hold up a minute, I'll try the other guns. Okay, maybe you can make it easier to switch weapons (buttons like 1, 2, 3 to select). Also, display the weapons on the UI and show which one is selected. They all look the same, so you might want to change that as well. Though, it is pretty cool that you generate the level and have random start and end points.