hey great score! I really appreciate the comment. I believe the breaktime is the base value for how long until your tank malfunctions, with some modifiers applied to it.
the stats are just a little fun thing for me and only partially tied to game mechanics. If I remember the second one is how slow your oxygen depletes and how much you're slowed by picking up gold. The third stat might be the tank quality, so high value means it takes longer for the tank to break.
and the snow map is the same, just the sprites are switched out.