Thank you for playing the game and for your feedback. I really appreciate it.
The other modes are not available at the moment, but there will be at least a time component to bring in some "hectic", variable amount of colors, also I am thinking about other ways to "disturb" the player.
Good to know, that under some circumstances it is not easy to find the starting point. I will think about making it more visible in some way.
The additional goals are a good idea I haven't thought of finally. Maybe it will work with some predefined playing fields to achieve a "final color goal" or something similar. In the next release (hopefully today or tomorrow) there will be different color sets available, as it is/was my next feature on the roadmap :)