Improved performance and menus.

Hi all, here's the latest update;

-Reduced workload on CPU.

-Less choppy menu transitions.

-Some visual changes on the menus (more work can still be done).

-Updated visuals and added more checkpoints on some levels.

-Other minor bugfixes and tweaks.

Hopefully more sound and music will arrive in the next update or the one after it. Have a nice day!