Stealth mechanic was part of our initial plan :D, but we ran out of time and it had to be scrapped(at least for the gamejam release). Funny thing is, we have increased the map size to make the stealth part easier and then removed whole stealth side from the game and never changed the map back, although it may be useful for adding stealth and some coop elements after the jam.
I'm glad you liked it :)