Wow, such interesting physics mechanics! Buoyancy and Gravity are my favorite forces to keep fiddling with. I really like the way you've gone into developing this theme, as two entities that are attracted to each other so they could finally join in unison! Just so you know, here in Brazil the Valentine's day is on June 12th, so the fact that you've done sort of a "romantic" themed game in that period turned out to be a very peculiar coincidence! :D Also, great job for a solo developer! I know the pain