'r' is far too weak
rolling not stopping on its own may be "realistic" but feels wrong
the invisible walls around the play area are infuriating. lots of stuff you want to grab, constantly just out of reach.
you claimed every repair will add benefits. just increasing your max carrying capacity is not "benefits" when your o2 is still the limiting factor.
all in all, this game is impressive, technically, but you made design decisions, consciously, that should have been made very differently.