More bug fixes!

#Bugfix

• Fixed a small bug for JUMP movement (the character was jumping a little higher while UP button was being pressed);
• Improved the JUMP movement (it was a bit fast for some people);
• Adjusted the JUMP movement for underwater areas;
• Smooth camera system implemented!;
• Fixed areas that were playing a wrong background music;
• Fixed save/load states issues (savestates were being erased after installing a newer game build);
• fixed some screen transition problems at doors;