I finally figured out what was missing from this game!!! You need 2 more coins. One that rotates one turn clockwise each time it's touched and one counterclockwise. That would make controlling multiple corridor levels much better if not more expensive.
This was a fun game, but you missed a couple of potential upgrades :D Upgradable shields, enemy AI, and ship slots so you have to upgrade you ship to get all 12 slots instead of starting with them should all be in part 2 :D
 "Dungeon Developer"){kind=icon}
 "UPGRADE COMPLETE!"){kind=icon}
 "Dungeon Defender"){kind=icon}