Thank you so much for the feedback!
I didn't have enough time to make a proper in game popup menu to quit. But you can also quit the game by just closing the window, the game has a saving system and if you reopen it you will start from the last room you was in, so you don't need to worry about losing progress. About the new game button, it does exist , but only when you finish the game🫠 so yeah haha. If you want to start again before finishing it you can go to %appdata% and find "spintowin_jam2026" or something like that, and then delete "slot1" from the save folder.
But I do plan to keep working on it when the jam is over! So all this stuff will be improved hopefully in the future.