I feel like it only misses some mechanic to make it a bit more game, it is super hard not to murder all your friends while you were trying to heal one, but it's an intersting mechanic, if understanding how to move, make friends and all was easy enough, it wasn't really clear what i had to do and that the acutal challenge was trying not to kill my friends, which is too bad cause it's fun to cause self destruction.
Maybe you could trying using a grid for the character movement, as it would make everything more about strategy than trying to block people on the edge of a block or having issue because they pushed each other into the walls (happened a few times that i got someone stuck inside one)
Also, the end shouldn't be hidden as there's no time limit, threats other than yourself or treasures lying around, exploration isn't really attractive, before i found there was a place to end, i thought that i had to try and recruit everyone, and that it would only end when all the people alive are my friends.