I like the concept here! I feel like it could use a little more balancing. The first level was great fun as I just shot at everything until I realized I at deaths door then, well, died. The next play through I just ran past everything without really shooting and was able to get through the rest of the game without much trouble. I feel like if you had more expansive or complex levels so that stamina was more of a prominent factor that could have helped keep that strat in check more.
If you'd like to see our take on the theme, check out our puzzle game, Ka-Bob!: https://itch.io/jam/gmtk-2019/rate/460345