Great small level! Took me a while to find my way to the end, so I was really surprised how many different variations there ended up being once I got through. I really enjoyed the way to get from 175 to 173 as well
Hmmm... Sorry, one star less because it's a standard pipelining case with a lot of wasted space.
Good is, that this level reminds/teaches one of the basic pipelining tricks. :)