Hello and thank you for you feedback! I developed this prototype game as part of Mini Jame Gam #42. And yeah, this game should be more self-explanatory... In fact, you just need to open all the rooms and still manage to get to the boss with a sufficient level of health
I know you were in MiniJam Gam #42 :). I was there too and that is how I found you. I try to give feedback for devs to grow up as a developers. Of course games are incomplete and not perfect :). If you run out of time, put some simple message saying what is the mission of the game. Happy coding on the next jam!