I hope you add customizable colors. That white text on dark background skin is looking damn awful to me :-)

Beside that, make sure that you add all standard features of good text editors. The editor of my choice for Gamestudio projects, ConTEXT is now free & open source and maybe you can have a look at it.

"AckSense" is promising and would be the only reason why I should use this tool. Make sure that you don't add too much fuzz, concentrate on the core components first.