for the past week I've been constantly updating the in-game menu to offer as much functionality as I can put in. The dropdown has been replaced with a dynamic window containing previews of your maps. These thumbnails are small in size and won't require a lot more space than the map itself.
To see these changes you will need to download the latest version because the format has slightly changed from the previous.
The format for settings has switched to a simple json file for easier manipulation within the game. There were also some code improvements which should increase the performance of physics calculations.
Slojanko