I was able to do the latch level (2.11) using a single OR gate. It did pass the tests, but I am not sure if what I did actually works in practice. (Force as one input, then feed the output of the OR gate into the other input) The fun fact after completing the level mentions a bistable latch (I don't know what that is) using two inverters, which I didn't use.
Agreed. It should get itself into a twist with the undefined output being fed into the input and therefore the output always being undefined or 1.
Likewise, level 2.12 is a bit messed up, given you can ignore BitLineBar. I'm not sure what the intended solution was.