controls...

[waffle]

I think it would be a good idea to have "tool tips"
or Messages that pop up to describe what the "current"
screen expects as input....

example:
if you have the mouse as primary controller,
each screen should pop-up a brief memo as to exactly
how to use the current device (mouse) to provide valid
input....

Or maybe just have it pop-up while the F1 key is held down.
It would make learning to play much easier.