

Also it takes 65 frames to transform, and lasts for 500 frames


In general, the Guidelines suggest to go with hardest if there's "miniscule time differences between difficulties" or "if you're unsure". I chose Hard because it would increment the challenge a little in the form of not abusing damage so much, would be boring if I just relentlessly rushed through the enemies. There are 3 difficulty levels: Easy (4 lives, 5 hats), Normal (3 lives, 4 hats), and Hard (2 lives, 3 hats).
