Hi! I could program changing maps in the middle of a run, but I can already see way too many bugs to make it worth trying, and it would also be way too easy to switch maps when an enemy is about to hit you hahaha. Thanks so much for your comment!
Maybe a button for ending the run, just simulating a game-over so you can choose another map.
A surrender button might be implemented, but the next update will take a few days!