Not sure i get the full gameplay mechanics, as i placed some triangles and pressed start, only for the triangles not to do much and the circle simply shot through the walls. Could use a lot more (in game) explanation i would say.

Kudos on completing your first project! Extraordinary achievement to also submit it in a jam. Great concept that you have here. The game closing at the end makes sense if you think about it from the enemy's perspective because when they die, their script ends. Really fits the theme well. Keep it up!!