In order to experience most of Ultrakill, you are expected to have a higher level of mechanical skill, accuracy, and perfection than any game I've ever seen. It's not enough to just get good at what you've got; you need to be actively researching new strategies to even stand a chance at just SEEING every stage. If you cannot commit to perfection, then you're shit out of luck. You might as well not bother at all, because unless you give the game perfection, it'll give you basically nothing.

For the unskilled masses, Ultrakill is a shockingly short campaign with somewhat repetitive gameplay and an underwhelming story; best played by people who are better than you, and best experienced via Youtube longplay.

Difficulty creep is the unseen spectre of early-access game development.