This is a solid action game! I really enjoyed trying outsmart and evade the enemies. The initial amount of health is generous, and the ammo regeneration and pickups manage to strike a balance between being challenging without being unfair.
Unfortunately, the inability to heal kind of undermines this sense of balance. It was particularly disappointing when I picked up a crystal, then had to backtrack out of the planet, level by level, but this time with barely any health. Realistic? Of course... but anticlimactic. There's a reason Zelda teleported you to the dungeon entrance when you found the Triforce. :)
A few more sound effects would have added to the sense of immersion, too.