Beta-IV, Ali-Babah and his thieves added to the game!

In this version we've added a brand new extra level where you must kill all the thieves of Ali-Babah (cuaa, cuaa).

 CHANGELOG

-Added an extra level (Ali-Babah and the 40 thieves, which goal is to eliminate their)
-Change the desert background music.
-Added a background music in the main menu.
-Added a minimap switch.
-Added sliders to change the music volume.
-Added a 'Thanks!' screen, with all the partners who has helped us recording gameplays.
-Delted the 'Bugs?' button.
-Changed some translates.
-Fixed a bug related to the spikes hitboxes.
-Added a dialog to change the window resolution.
-A few more bug fixed.
-LOTS OF MADE-IN-CHECHU CHANGES