Hm, perhaps I should expand the handling of 'i' to become a toggle. As it is now, the instructions are dismissed with "Enter" (as is shown on the instructions page).
(Truth be told, it should do it when you let go of the key, so it doesn't jump directly into the game...)
Seems like I will have to look into that. Which version exactly did you have this on? If it was the web version, could you give an offline version a try?