Enter Key did not start the game. For me it was Z after I spammed my keyboard (I'm on a Mac so idk if this will work for anyone who has a pc) Z also seems to be the key to use to cast bait. To catch a match you have to click z (labeled A in game) when the heart flashes above a fish in the water. Then the game will prompt you to quickly spam z (a) to successfully catch your match. I'm docking a star for the confusing controls but overall the game is pretty cute and straightforward. I hope this review helps some players who couldn't play the game before.