1.9.3b released

1.9.3 beta is out

As previously said, it's not a big 'feature update' as you might have expected, however
we believe it was necessary for us to do a mini-fixing update so the game would be in a better state than it was before.

What has changed?

>Fixed difficulty in challenges
>Fixed achievement menu (now it counts them correctly)
>Fixed texts in profiles' menu after deleting a profile
>Fixed music volume after deleting a profile
>Fixed text after winning Challenge 2
>Fixed weird background glitches
>Fixed "Skip music" behaviour
>Fixed a bug where you could have 2x of statistics counted
>Fixed shield icon display on hard difficulty
>Text with game version has correct depth set
>Explosion particles have correct depth set
>Better window behaviour while loading the game
>Better profile colors handling for pre-1.9.2 save files
>Added backing up from options by "Escape" button
>Shorter amount of time after which music starts playing (2s -> 1s)
>Turned off bg layer is unloaded from video memory