Thank for your ideas, i have read your comment in full.
I think i will continue the development of the the game, I know for the soud but I really didn't have the time for doing it before sending the game. The path finding is a really good idea and It is thing that I will do after the sound. I will also add differents spells with differents mana costs.
The white time counter is effectively an information conter and thank for the English mistakes.
Ps: On est bien français.