Gameplay is fun and has some good variance when you get upgrades. I liked the bits of lore in each level.
Presentation seems relatively simplistic, although the black pillars/walls and field of vision effects are well done and help sell the aesthetic. The music rocks too!
For improvements, a map you can pull up would be nice, and some visual feedback for when you or enemies take damage would improve the game; sometimes it could be hard to tell when enemies were hit by my attacks.
Solid submission. Well done!
Note to self: Avoid the Cactus