I really liked this game and I totally would have played to the end, but level two would never let me complete it even after I killed all the enemies. Then I reloaded and played through it again, and the same thing happened to me on the final boss (I killed all enemies and nothing happened, had to run out down the clock). Which is tragic, because I loved the gameplay loop! It was simple and fun, and I think having a menu setup like yours is genius for a game jam because players can see the end. I am taking a lesson from this game, which is to make fewer levels and make them more polished instead of making a sprawling game that's not as well crafted.