[Implemented 1.03] Add Autosave

During my first few hours of the game i had random crashes, wich is okay since its alpha, but my suggestion is adding a autosave function ASAP so we dont lose all the work we did.
Also add a highlight to the demolish function, so we can see exatly what we are destroying

Keep up the good work!

yup…really must find a time slot to add autosave!