It has it's benefits and weaknesses.
It's really fast to make a game in it, because it has tools for sprites, maps, music, sfx all built in. It also has a limit on the size of the sprite sheet and code, so it forces you to not go too big on a project.
The weakness is also the fact that you can't scale it up, so if you reach its limits you kinda just have to wrap it up as is or use another engine.