Patch #2

• You can delete songs that you've uploaded by pressing Del
  
• You can now play with WASD
  
• If you want to upload a file that's already exists in your playlist, it will upload but the name will be changed to "1/song_name/"
  
• The central stripe on the table is almost transparent now so it will be easier to hit ball when it flies from center to center
  
• Added Polish language (thanks to Kiran)
  

I will now work on Leaderboard system.
Don't forget that we have a Discord server https://discord.gg/mD6tHDE