Plutonium

Can't see your picture...

 

You want to look at the A* algorithm for tile based (or node based) pathfinding http://en.wikipedia.org/wiki/A*_search_algorithm

 

which is usually more efficient than Djikstra's algorithm which is basically just a flood fill.

 

EDIT: I can see your picture now, can't see any tiles though ;)

think that all rectangles are tiles (could be more then one in same place) and all other is alot of white rectangles that was just fast drawing  

But maybe not tiled based game would be better? Talking about pathfinding

I don't use XNA at all, but, isn't XNA dead? (Miscrosoft isn't supporting it anymore, last I heard).

 

I'm sorry I don't have an aswer, but I'm curious as to why you're still using XNA

Just today saw that XNA is dead, but for learning if think get some good experience from it Later what I learn now with XNA, I will able to adapt to other API ;)

check this out, also look here for engines. and why not stick with XNA for a while?!

First link looked and not found something really good And second... Will look after job
About xna, don't really know why don' want it. But installed it, and will try again with it , because couldn't find anything better

Start learning XNA. It uses C# and give a lots tutorials.

Here, some links. Maybe they will be usefull:
http://zetcode.com/tutorials/javaswingtutorial/ for understand swing
http://zetcode.com/tutorials/javagamestutorial/ later try this. I suggest to read code, understand, and upgrade games. I think it would give some knowledge
http://www.youtube.com/user/TheJavaHub and this guy have some good tutorials