I had a good time with this entry. I like how much more polished everything is this time around and placing the boosters was a fun toy to mix things up.
I think 89o is right in that you could tinker with the movement speed and change the system for placing the boosters. Placing them is fun, but doing so could be smoother. One small issue, not even a bug, just a typo. You have North East twice. The bottom one places a North West booster, it's just mislabeled. Didn't mess up my experience or anything. Just sharing in case you hadn't noticed yet.