Definitely a solid prototype! There's certainly some things that need to be tweaked and continued work on, but the core idea is really good!
Main issue I faced was not realizing that the dynamite was coming from behind me. Took me several tries (and reading your game's main page) to realize that dynamite was the reason I kept losing, and that I needed to turn around to shoot it. Once I figured that out though I was able to play it for a decent amount of time!
I feel like this idea has a lot of potential and could easily be expanded on and become even better! Great job!