Interesting concept, but I found it quite difficult and I'm not sure why sometimes I can collect the skulls and sometimes I cannot.
EDIT: I gave it another try and I was able to win!
Viewing post in Dungeon Prisoner Escape jam comments
Thank you for playing my game!
Just for you to know, the skull collection becomes available only when the "boss" (the larger enemy) dies. Then you have 30 seconds to collect 8 skulls in order to open the hatch (witch leads to a win). As soon as the boss dies, the doors at the top start spamming enemies. If the boss respawns (30 seconds) and you haven't won yet, you drop all the skulls, and have to start over (kill the boss > collect another 8 skulls > find the hatch to escape).
Thank you very much for your feedback!