I played it and I CAN see the vision, there are some things I think should be changed a bit (or not, it's your game).
1. Saw mode allows you to move but bomb and gun mode don't. I find it kinda weird. Allowing it for the other modes would make lining up shots or bombs easier.
2. Not sure about the character having to "gain momentum" for a sec before you can walk normally. Personally I think without it it could work well but I am not sure.
3. I do not know how hard it would be but how about the camera in third mode being controlled by the mouse too instead of it being static? And when you go gun mode it quickly zooms into Tailgun before going 1st person mode?
I think Tailgun could be a pretty good game, you can do it!