A first look at my overworld engine for Abstráctomon! Objects automatically get collision and the correct depth (depending on the player's y position so they are either in front or behind him) and background tiles can be animated. Signs work already, too!
The character's sprite is a placeholder of course :)
Tip: in Game Maker there is a problem with tiles when color interpolation is active (a basic form of anti aliasing). You can get nasty gaps in between tiles depending of the screen resolution. Luckily, you can switch it on and off during gameplay!
So the game looks a bit sharper now & tiles work perfectly.