Do you recall if your "balcony/entry" room was properly rotated?
It seems we could have been far more clear about the fact that, unless the balcony room is properly oriented, getting out of gridmode is not posible.
When the jam finishes we will 100% add a little popup warning explaining that whenever someone tries to go back to platforming mode from grid to the full version. (Hope this didn't sour the experience and also thank you very much for the kind comment n-n)