Not sure without seeing the game. I personally wouldn't even click on a icon with a love heart on it. LOL Thats just me though.....
Work on the contrast. Use another color for the background. If your game looks like that do the same there. It is very bad design wise using just the same color for everything. Search for valentine color swatches. That might help.
none unfortunately. Do some research on game icons for valentines games/themed. Even look at games like Candy Crush or Angry Birds - do they theme their games with the season of 'lurrrv'?