Just started, seems like a really nice idea, but I can already say one issue that exist is that's unclear what does Karma and Reincarnate do... You might want to fix it to make it understandable: When can you Reincarnate? Why and when should you? and so on...
Thanks a lot for your comment!
The game will show you an indicator as soon as you can do a reincarnation (it's after reaching Prestige Level 8).
If you try the reincarnation before lvl 8 the game will tell you the min. requirements.
You don't have to reincarnate then but I would recommend it. :-)
Have fun playing 'Dark Idle' and please tell me your opinion after the reincarnation.