Normally when you right click on the game's window at the taskbar you should be easily be able to move it with the arrow-keys into vision. The mouse only can 'grab' to it when it's clearly visible on screen. Getting ahold of any corner at all allows you to resize the game in any way you can imagine.
And: Already ahead of you when it comes to 'adding to the game' after the jam ^^
Stay crunchy.