you still can finish the level but you have to go blindly. :)
off course it is not suppose to happen
But I can't click offscreen to make a platform...
the end is very close, put a platform at the very top of the screen then jump. It is a bug and unfortionatlly the jam has ended. You can download and play the patch version but note that it is not a part of the jam.
And thank you for playing and for your feedback