I love the concept of choosing between a light and dark path via upgrade system, and I love the art. Audio gets a bit shrill but luckily my speaker isn't that good, and the surprise boss was hilarious.
I also love that the two sides play very differently to one another! The light side has high fire rate but normal damage, like the normal attack and the fire pool, while the dark has high damage but lower fire rate like the bomb.
My only minor issue is that the game is that it seems weird that the player HP is in text when the boss has a full on health bar, but I understand they work slightly differently.
Overall, the game is great, and I'd really love an expanded version!