It's a fun little retro game. It can hurt your ears when turning the volume up. Thankfully there is a mute button for when the sound effects are to much, or just simply lower the volume. As for the leaderboard: you really have to grind a lot when you encounter bosses that spawns enemies in order the get the highscore. The medals systems needs a little bit of work, because I couldn't get the tiger orange medal on my fifth try. It's probably a bug or I haven't played the game enough to earn it. It's good for what it is: a homage to classic arcades.