A maze game

Im trying to develop a small children's game in my spare time. I have a rough idea, but ill just have to wing it a bit and see where it takes me. Its early days in all respects - my coding skills included. This is what it looks like so far...

Not much to look at, i know, but it took me a while to get to this point. The maze is randomly generated, which sounds simple enough i guess, but actually implementing it turned out to be quite the headache.

Im quite pleased with how it all worked out, though. The way i build the maze, each cell type ends up with a unique identifier number. In short, it tells where a cell has walls, and its a great help going forward with the code. At the moment im working out the collision detection, and already the system is paying off.

Also im working on the art side of things. I have yet to figure out any style or even an idea about what to do for the maze layout. But, i do have a pretty good idea about the characters. They are all numbers. Here's the Police Officer...