I applied online and was contacted by a recruiter a few weeks later.

I was asked to complete a 90-minute programming challenge.

This challenge could be done in any language, but had a strict 90-minute time limit. I was able to complete it whenever was convenient for me.

The challenge required me to create an algorithm to solve a game based on a somewhat convoluted riddle they devised.

I did not end up finishing the challenge in time. A few days later, I was informed that I would not be moving forward with the process.

The time limit was really tough. I came up with a really good solution in the last 20 minutes but didn't have time to get rid of the stuff I had been working on and fully implement the correct solution.

If I had been on the phone with an interviewer, I could have at least explained what I was thinking and perhaps gotten a little more credit for my idea.