A lot of good things I can say about the game. First, the theme was spot on and I think trading off HP was essential to finish the game, which I did. My first run was just trying to survive without sacrificing any health, and that led to my demise. 😂 It was a bit challenging, and not in an annoying way. Graphics are crisp and easy to the eyes. BTW, nice use of contrast for player and background. Perhaps you could do the same for the enemies, like they share a same color (like in a team) for that extra appeal! 👍
Another thing I liked was the music, a little bit sci-fi-ish combined with some rock tunes! Works well!
I also liked the growing energy ball (dragon ball z style!) but sometimes it kinda obscures the player, not a big prob though. Also I wasn't sure if those dudes with projectiles have a SFX when they shoot, maybe it's kinda muted. If there isn't, then it would be nice to have. Just to add danger cues for the player. Because the Zenyatta dudes caught me off-guard on my first run, sniping me off screen.
The controls were smooth, had no problem with it whatsoever. And lastly, I always enjoy finishing games, so thanks for keeping it short. Overall, great job for making it!😄