PS: This is not my submission in the competition. This one here is taking considerably more than 48 hours of work. ;)
Some of the features include:
-New type of level: canyon
-Sound effects
-Several animations and physics bodies' collisions now release particles
-A little special effect indicating the usage of the double jumb - before we added it, some people thought the character was bouncing on invisible objects
-Some new enemies
-The other Pixel Cow of the team, the supergenius programmer João Pedro acting like a noob and making mistakes on purpose while he plays, only to show all the features of the physics engine. :)
We hope you like it! And to those who are participating in Ludum Dare, good luck!
Gabriel