I didn't expect to see an animated cutscene, nor multiple types of gameplay :O
I made it to what I assume is the "normal" end, thinking it felt short, but realised I might be able to break some things. A short while later, I collected the gun and found the God of Chaos, so I guess mission accomplished.
I found the controls to be very unintuitive. Not only were there multiple different things to keep in mind, some that didn't even seem to matter (sneaking and sprinting), but then I had to juggle using the mouse at the same time. Luckily you have the option of jumping with up in additon to space, because using space, the arrow keys, and the mouse at the same time does not feel like a good idea.
Other things to keep in mind is the leap of faiths. Some falls kill you, some lead to platforms, such as the first drop you have to make.
The game does lend itself well to replaying thanks to its short length and the faint hint that there is something else.