Hi mate,
Thanks heaps for the feedback and the video link, much appreciated! Although you commented that this usually isn't your sort of thing you actually performed with a very high degree of aptitude for a new player. It was heartening to see a player like yourself with a good level of gaming literacy be able to connect some of the dots (like the wall speed indicator) more fluidly than we have seen with less experienced gamers.
Unfortunate you had the issue with the sound levels. The solve for that must have somehow gotten disconnected during one of our hot patches. We will put it on the bug list.
Many of your gameplay specific questions are, for the time being, answered in the 'Learn to Play' menu but we hope to smooth out and integrate some of that learning process with some of the onboarding features we are currently working on. There are actually run modifiers (find in main menu) that tweak how the game plays similar to the skull unlockables in Halo which would be a good candidate for your random mode idea. We actually have a feature similar to that we are working on to have a mode where you can almost play the co-op version by yourself with the bricks automatically placing themselves.
Thanks again for the feedback and video!