Just so you know, I killed 'that one' with ease:
In all seriousness, from what I have played so far (2 levels), this seems like a very well made game, with a few flaws. I have a few suggestions to make:Make the base health bar easier to see. Either make it larger, or put it somewhere on the player hud. I genuinely did not know the health bar existed until my first death, shortly after the video. Also, compared to the enemies, you feel a bit slow. It is also hard to tell when you are at low health, so some kind of indicator would be useful.
The soundtrack is very unique and memorable, though repetitive. I assume this changes once you are out of the first world. The enemy design is distinct, and the weapons feel very unique and powerful.
I'll write up a more in-depth review after completing the game. But so far, this looks like a very good and engaging game.
Also, the text to speech at the beginning threw me. The references are very fun, it almost makes me wish for a 'For Karl!'.