I agree with you about the last level. I definitely needed the "cheat sheets" as the options for properties are difficult to remember (names kind of blend together). Finally I opened another browser window on the site I could refer to. Then I was able to glean the right options and solve it without too much difficulty.

I too struggled on the last level, which was certainly jarring because the ramp up until that point was quite gentle.

That said, I did enjoy the last level as a challenge; it prompted me not only to review earlier levels, but also check documentation elsewhere. Much like a real-world challenge, these can be valuable learning experiences.