Fixing easy problems - Cave of wonders

The next round starts in 5 days, so I decided to take a look at the project and the comments in the submission. I really didn't expect much from the game, but it seems that it was liked by others!  Leaving that aside, here is the list of the solved: 

1-Now you can use WASD as controls and jump up key.

2-The music now it is in loop.

3-Planning a future optimization to the game in general, thinking that maybe I pass this round.

Thank you for your feedback!

(In a few hours I upload the updated file.)