Thank you so much for playing! I am aware of the bug, I will try and get a patch out for it soon, my evenings have been somewhat hectic lately. I still don't have my own system, so it makes bug testing a little tricky, but I intend to release bugfixes where I can and when I get my own system I will probably release a patch with a few more bits and pieces in it too.
As for 1-7, I just double-checked and it's definitely completable. There are a few red herrings on that level designed to trip you up. Don't be fooled into thinking there is just one route on every level!