@krub you should put your game images in your post, most people can not be bothered to go download a RAR of your images from a filesharing site. Your artwork looks good.
Regarding taxes, you should get some advice from an accountant, especially if you end up going with a publisher which gives you a greater potential for financial success. I quickly looked at taxes in Turkey, personal tax is 15-35% and corporate tax is 20%. So why pay potentially 35% when you can reduce this to 20% :-)
In terms of a who takes what illustration:
Customer Pays $0.99
Apple Takes $0.297
Publisher Receives $0.693
Publisher Takes $0.208 (Lets call it 30%)
You Receive $0.485
Potential Tax $0.097 (Corporate Tax 20%)
Your potential take home (Barring any additional personal taxation on getting money out of the company)
$0.388 Per Download
Now you have to look at a publisher as the business cost for your marketing, what you want to get for that cut is to launch your game into the top #10, after that it will sell just for being in front of as many eye balls as possible. In theory if the game is good and enjoyed by the masses then it will stay around in the top charts.
However you have to bear in mind every week X publishers are pushing their next big title launch and hoping to repeat the process.