i didnt see the how-to button, but ill check it out after posting this to see if it would have helped. what was mainly confusing for me at the beginning was understanding the objective of getting the microphage to the bacteria. because the microphage and bacteria (at least on the first level) were colored similarly, i thought they were two different types of bacteria and i was trying to prevent them from getting to the agar (which i thought was the microphage, i guess?) in retrospect, it's obvious how the game works, but in the moment i had no clue what i was supposed to do. after reading the game page and some experimentation i was able to figure it out, though.
Thank you very much for the detailled explanation! This is perfectly valid and makes sense. I should have made at least a minimal intro screen, maybe in-level, to show the goal of the game and explain the elements you can see, at least a little. I'll keep that in mind, thank you :)
I was also not sure on how to handle the How To. Having it open in each level might be annoying, but on the other hand, players might miss it - and its content changes from level to level, depending on what i thought was relevant. I have to think about that :D