Well I use GM, but I think you can use the Grid Nav (I think SC calls it Smart Nav) and code the grid to your advantage.
Yeah, but just to be clear: the Smart Nav is a grid navigation system written by Melvin for Silver Creator, and is not an adaption of any GameMaker grid navigation system. There was a little confusion over this awhile ago, and both myself and Melvin were in danger of being falsely credited.
The grid navigation systems for GameMaker are simply named Grid Nav V*version number*, and often abbreviated as just V*version number*. The latest Grid Nav for GameMaker is V6, which contains only a slight
but drastically important change to the previous version. V5 was originally written in Silver Creator by EqwanoX and ported to GameMaker by myself. V6 was originally written in GameMaker by myself.
While the grid navigation systems considerably reduce the work in making tile based games, they're kinda hard to understand when you first attempt to grasp the code. I recommend starting off with a none tile based game, as it can be very discouraging if a problem occurs and you figure out how to fix it.
Also, welcome to the boards WarHampster.