I liked how this looked. I wish the mechanic for getting the boxes was easier tho. Maybe picking up the boxes only requires 1 click and throwing one click and also having to directly look at the box to pick it up its abit hard since i also have to keep aware of the enemies position. Those are my feedback. Hope it helps!

Nice job! I was sucked in by the drive to get better at the mechanics. It did feel somewhat inconsistent when the boxes exploded and when they didn't. I could have been doing it wrong though. By the end I was running around dodging things, watching my health (and picking up more when low), and scooping up points where I could. Overall it was good. It was hindered by my confusion of the mechanics. I like the idea of the objects having so many uses. They were ammo, powerups, and enemy ammo all at once. Very cool idea.
Edit: I reached the end with a negative score because I died so much, but I just ran around afterward and grabbed more points for fun, so i technically closed the game with a non-negative score.

Cool game:)