Update Notes for v1.2.3

[b]New Additions[/b] [list] [*] Dark mode can now be enabled from the Options menu [/list] [b]Improvements[/b] [list] [*] Better random number generation for Custom Levels [/list] [b]Bug Fixes[/b] [list] [*] Fixed the Sound and Music sliders showing the scientific notation number when it should be 0 [*] Pressing Escape when in the Custom Game Menu now takes you back to the Main Menu instead of quitting the game [/list]