Thanks for the kind words.
You are supposed to destroy the crystal once all the enemies are defeated to advance. We had a lot of trouble working out how to convey that to the player and may not have communicated that well.
Yeah, unfortunately, we set our scope too large for my skill and weren't able to finish it properly. You were supposed to spawn with a limited lifetime that is randomly generated and use multiple lives to progress. But I decided to submit what i had even though it doesn't work. hopefully, we can do better next year.