I liked your game so much! First of all- the theme of love letter is just so nice and wholesome it made my heart warm! I literally want to hug my wife right now!
- Other than that. Graphics were cool and the paper plane really fit the theme of the letter quite well.
- Background song was nice, but not intrusive. Voice spelling out the letters provided nice feedback about if I got the letter, or not.
- The difficulty ramped up fast (maybe a bit too fast?), but that made me play the game a bunch more times :)
Over all- your game just hit me in the right place!