This is a REALLY neat idea, but a few things I might change.
- The camera angle makes it really difficult to know exactly where you're
placing bombs. Up higher, and possibly isometric, might help. - There isn't much of an incentive to slow the rockets because they still pursue the convey and impact. Perhaps putting a max life on them so they detonate after a certain time would better incentivize slowing rockets rather than the turret.
Otherwise, this is well done!