The combat is definitely something we would have like to work more on given more time. Adding different upgrades, boss variations and tweaking the balancing. The timer is a valid point, we struggled to find a concept where a timer stood out as a unique mechanic. So we decided to go all in on making it a gimmick, we would of liked to make the values go all the way into days and years. Gaining / loosing years of oxygen sounded funny to us.