It was difficult for me to understand when I was taking damage. It was hard to me to understand what is background, what is mobs, what is environmental hazards (if there are any - I think some of the barrel-like things are maybe hazards). Turning into white (and maybe red?) particles when jumping threw me off, I didn't understand what was going on. Had to go back to the landing page and read the instructions, but I am still confused about what I saw.
The turning-into-crunched-eye-thing death animation is cool.
In general, it felt a bit like receiving an electric shock. I did not survive 10 minutes.