Comparing with a game that inspires me to make this kind of levels it is very easy but I have to say that it is, however, not the easiest level nor challenge in Invasion. Although yes, the last part of this challenge is the most difficult. It simply needs a player to be very calm.
About the enemies in this challenge are that yes but no without dying also. Impact of another vehicle causes both to explode. Vehicles in this challenge are not for fighting but racing only and you can consider this level as a pure survival.