Stone Age inspired me to create my own game (currently compiled only on Windows -
http://metod.co.nr). There are 8 tutorial levels, at present.
If there will be some interest, in this game, then I will build more levels.
The level building process is very easy. All You need is notepad or any other text editor (check data\levels folder). So if You are interested in creating your own levels just let me know, and I'll write list of corresponding ascii to tiles relations. Of course, You can use your own tileset (check data\graphics folder).
I'm open to any opinions and suggestions.