The "guided bullets" become unavoidable once you lose the boots, making the game hard in the sense of punishing you for playing. You should be careful with that, since making a game punishing is not really enjoyable, while making the game challenging but fair makes it the style of Dark Souls and similar games.
Maybe rebalancing the enemies with some "Enemy powerups" being taken away could help with this. (For example: Chest has 50% to be allied powerup or enemy powerup).
Also, the laser feels a bit weird in the sense that you can choose the length of the beam.
Other than that the game fits the theme perfectly.