Level 11

Possums are often underestimated.

You might wanna translate all of this:

0101010001110010011010010110001101101011011001010110010000100001

And solve this: 3 + 6 + 9 + 12 + 15 + 18 + 21 + 24 + 27 + 30 + 33 + 36 + 39+ 42

And here's a riddle for you asylum patients: I believe this might walk on four legs, then 2, then 3. What am I talking about?