Gameplay wise this is probably one of the more balanced and engaging games I've played so far, it had just the right amount of difficulty to be rewarding but not enough to be frustrating, although it was hard at times to gauge the distance of the health pickups from the screen so I found myself missing many of them.
The flashing when fighting THE CUBE boss was a headache waiting to happen, especially in an unlit room, a definite warning for people with epilepsy .
Bonus points for going out of your way to mention that you used Neovim