add a "hard" mode

[silentwings]

imo to do so, keep regen rate as it is but lower hp, maybe also have more robots or tougher robots (easy to implement with UnitPreDamaged, just make them only take 2/3 damage or suchlike), etc.

[gajop]

we could hack something in for tomorrow (imo just make player's HP 1/4th of what it is now)

however, the game isn't balanced that well right now (rooms: 7-10, 13, 14 are ridiculously easy), and some of the encounters need a lot of rework; also the boss fight is pretty boring.
i think we can do something hacky now, and discuss how we want to balance gravitas in a .doc

[silentwings]

In that case, let's do nothing for now.