It wasn't obvious to me that you have to press two keys (diagnal) to select on the map screens, and as escape doesn't work there, I ended up having to quit using the file manager. That minor gripe aside, a good remake.
He wanted to be faithful to the C64 original! :)
Speaking of faithfulness, the only gameplay difference I noticed are the walls which only need one shot to be destroyed.
An excellent remake, and one of my favorites on the C64.