neat sandbox :) ; controls are difficult but with a well-thought progressive tutorial I can see it working :)
the editing of the rumba has a few bugs (I was stuck in changing the chassis, I could unblock by building) ; but is satisfying to use !
The default perspective of the editing (and the way the rumba is flying) makes it difficult to gauge the size needed for the barrels (my first attempt ended up with a ridiculously small rumba, which was funny but clearly suboptimal)