Deceptively Addictive, but needs Tutorial!

I was searching for a game like this since I switched to iPhone...previously I was playing a more primitive version on WinCE called LoCE. Minutes after purchasing the game I was actually regretting I got the game - having difficulty to know where to start, and the starting zoom level of the graphics didnt exactly look enticing. Just before I deleted the game, I stumbled on the instructions under help, and it got better since. In fact - Im using it like a fish tank now... destressing by checking out on how my protozoa was doing.
I think a tutorial would have helped for beginners, and yes - some of the suggestions given here in ther reviews are great, like other stimuli and food sources.
I would also like to suggest that we could choose the color of our protozoa? And the looks... is there a significance in the length of the tail? Does it make the protozoa swim faster?
Anyway - great job guys - keep up the good work... have another update, and I will not hesitate to recommend this game to more people!
Oh - a free version too might help in the marketing. ;)

Darick Yeo about Artificial Life, v2.1.4