I think that the lander worked out well because is is able to climb hills and rough terrains. The chassis needed to be more maneuverable than before so the wheels will not get stuck in the ground so it will go over the rocks and uneven terrains easier.
we also have been learning how to use basic javascript syntax we have been playing around with it by sending different lines of code to a character and moving it to the end of a maze. I figured that it is very finicky and it is case sensitive. We were practicing using codecombat.