Video
Game
Music

Also I found some files not in Volume0.res (Masha and Bear: Dogonyalki), from the masha.exe using HxD Editor:
First try: BACKSPACE, CAPSLOCK, CONTROL, DELETE, DOWNARROWorDifferent, END, ENTER, ESCAPE, HOME, INSERT, LEFTARROWorDifferent, PGDN, PGUP, RIGHTARROWOrDifferent, LEFTSHIFTorDifferent, SPACE, TAB, UPARROWorDifferent

Data: Sep 24 2010

Unused: LEVEL_EASY = 1
LEVEL_NORMAL = 2
LEVEL_HARD = 3
LEVEL = LEVEL_EASY
LEVEL_NORMAL
LEVEL_HARD (Unused Difficulty)

(First founded thing) Video File and Maps 1: maps/map_splashvideo/map_splashvideo.p3d (Offset (h) 6D 61 70 73 2F 6D 61 70 5F 73 70 6C 61 73 68 76 69 64 65 6F 2F 6D 61 70 5F 73 70 6C 61 73 68 76 69 64 65 6F 2E 70 33 64 in masha.exe)), maps/comics/p1.p3d (Offset (h) 6D 61 70 73 2F 63 6F 6D 69 63 73 2F 70 31 2E 70 33 64 in masha.exe)), maps/map_global/map_global.p3d (Offset (h) 6D 61 70 73 2F 6D 61 70 5F 67 6C 6F 62 61 6C 2F 6D 61 70 5F 67 6C 6F 62 61 6C 2E 70 33 64 in masha.exe))

(Two founded thing) Maps 2: maps/map_01.p3d maps/map_01_arcada.p3d maps/map_01_puzzle.p3d maps/map_01_bonus.p3d maps/map_02.p3d maps/map_02_arcada.p3d maps/map_02_bonus.p3d maps/map_02_puzzle.p3d maps/map_03.p3d maps/map_03_arcada.p3d maps/map_03_puzzle.p3d maps/map_03_bonus.p3d maps/map_04.p3d maps/map_04_arcada.p3d maps/map_04_puzzle.p3d maps/map_04_bonus.p3d maps/map_05.p3d maps/map_05_arcada.p3d maps/map_05_puzzle.p3d maps/map_05_bonus.p3d maps/map_06.p3d maps/map_06_arcada.p3d maps/map_06_puzzle.p3d maps/map_06_bonus.p3d maps/map_07.p3d maps/map_07_arcada.p3d maps/map_07_puzzle.p3d maps/map_07_bonus.p3d maps/map_08.p3d maps/map_08_arcada.p3d maps/map_08_puzzle.p3d maps/map_08_bonus.p3d maps/map_09.p3d maps/map_09_arcada.p3d maps/map_09_puzzle.p3d maps/map_09_bonus.p3d
maps/map_10.p3d
maps/map_10_arcada.p3d
maps/map_10_puzzle.p3d
maps/map_10_bonus.p3d

Offset (h) (6D 61 70 73 2F 6D 61 70 5F 30 31 2E 70 33 64 00 6D 61 70 73 2F 6D 61 70 5F 30 31 5F 61 72 63 61 64 61 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 31 5F 70 75 7A 7A 6C 65 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 31 5F 62 6F 6E 75 73 2E 70 33 64 00 00 00 6D 61 70 73 2F 6D 61 70 5F 30 32 2E 70 33 64 00 6D 61 70 73 2F 6D 61 70 5F 30 32 5F 61 72 63 61 64 61 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 32 5F 62 6F 6E 75 73 2E 70 33 64 00 00 00 6D 61 70 73 2F 6D 61 70 5F 30 32 5F 70 75 7A 7A 6C 65 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 33 2E 70 33 64 00 6D 61 70 73 2F 6D 61 70 5F 30 33 5F 61 72 63 61 64 61 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 33 5F 70 75 7A 7A 6C 65 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 33 5F 62 6F 6E 75 73 2E 70 33 64 00 00 00 6D 61 70 73 2F 6D 61 70 5F 30 34 2E 70 33 64 00 6D 61 70 73 2F 6D 61 70 5F 30 34 5F 61 72 63 61 64 61 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 34 5F 70 75 7A 7A 6C 65 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 34 5F 62 6F 6E 75 73 2E 70 33 64 00 00 00 6D 61 70 73 2F 6D 61 70 5F 30 35 2E 70 33 64 00 6D 61 70 73 2F 6D 61 70 5F 30 35 5F 61 72 63 61 64 61 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 35 5F 70 75 7A 7A 6C 65 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 35 5F 62 6F 6E 75 73 2E 70 33 64 00 00 00 6D 61 70 73 2F 6D 61 70 5F 30 36 2E 70 33 64 00 6D 61 70 73 2F 6D 61 70 5F 30 36 5F 61 72 63 61 64 61 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 36 5F 70 75 7A 7A 6C 65 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 36 5F 62 6F 6E 75 73 2E 70 33 64 00 00 00 6D 61 70 73 2F 6D 61 70 5F 30 37 2E 70 33 64 00 6D 61 70 73 2F 6D 61 70 5F 30 37 5F 61 72 63 61 64 61 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 37 5F 70 75 7A 7A 6C 65 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 37 5F 62 6F 6E 75 73 2E 70 33 64 00 00 00 6D 61 70 73 2F 6D 61 70 5F 30 38 2E 70 33 64 00 6D 61 70 73 2F 6D 61 70 5F 30 38 5F 61 72 63 61 64 61 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 38 5F 70 75 7A 7A 6C 65 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 38 5F 62 6F 6E 75 73 2E 70 33 64 00 00 00 6D 61 70 73 2F 6D 61 70 5F 30 39 2E 70 33 64 00 6D 61 70 73 2F 6D 61 70 5F 30 39 5F 61 72 63 61 64 61 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 39 5F 70 75 7A 7A 6C 65 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 30 39 5F 62 6F 6E 75 73 2E 70 33 64 00 00 00 6D 61 70 73 2F 6D 61 70 5F 31 30 2E 70 33 64 00 6D 61 70 73 2F 6D 61 70 5F 31 30 5F 61 72 63 61 64 61 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 31 30 5F 70 75 7A 7A 6C 65 2E 70 33 64 00 00 6D 61 70 73 2F 6D 61 70 5F 31 30 5F 62 6F 6E 75 73 2E 70 33 64 in masha.exe)
I think, Masha and Bear: Dogonyalki writted on programming language: C, Lua, C++ (Volume0.cfs (Volume0.res))
Unused 2: UnlockBonusPicture, GetDifficulty

maps/comics/p5.p3d
maps/comics/p15.p3d
maps/comics/titres.p3d (Offset: 6D 61 70 73 2F 63 6F 6D 69 63 73 2F 70 35 2E 70 33 64 00 00 6D 61 70 73 2F 63 6F 6D 69 63 73 2F 70 31 35 2E 70 33 64 00 6D 61 70 73 2F 63 6F 6D 69 63 73 2F 74 69 74 72 65 73 2E 70 33 64 in masha.exe)

scripts/map/s.script
scripts/dummy/s.script
scripts/gfx/s.script
scripts/characters/s.script
scripts/gui/s.script (Offset: 73 63 72 69 70 74 73 2F 6D 61 70 2F 25 73 2E 73 63 72 69 70 74 00 00 00 73 63 72 69 70 74 73 2F 64 75 6D 6D 79 2F 25 73 2E 73 63 72 69 70 74 00 73 63 72 69 70 74 73 2F 67 66 78 2F 25 73 2E 73 63 72 69 70 74 00 00 00 73 63 72 69 70 74 73 2F 63 68 61 72 61 63 74 65 72 73 2F 25 73 2E 73 63 72 69 70 74 00 00 00 00 73 63 72 69 70 74 73 2F 67 75 69 2F 25 73 2E 73 63 72 69 70 74 in masha.exe)

SOFTWARE\Microsoft\VisualStudio\8.0\ (Offset: 53 4F 46 54 57 41 52 45 5C 4D 69 63 72 6F 73 6F 66 74 5C 56 69 73 75 61 6C 53 74 75 64 69 6F 5C 38 2E 30 5C in masha.exe)

Unused 3: Unable to display RTC (Real Time Cutscenes) (Offset: 55 00 6E 00 61 00 62 00 6C 00 65 00 20 00 74 00 6F 00 20 00 64 00 69 00 73 00 70 00 6C 00 61 00 79 00 20 00 52 00 54 00 43 00 in masha.exe)

I don't know: Norwegian-Nynorsk (Offset: 4E 6F 72 77 65 67 69 61 6E 2D 4E 79 6E 6F 72 73 6B in masha.exe), fmod (Offset: 66 6D 6F 64 in masha.exe)

Microsoft Visual C++ Runtime Library (Offset: 4D 69 63 72 6F 73 6F 66 74 20 56 69 73 75 61 6C 20 43 2B 2B 20 52 75 6E 74 69 6D 65 20 4C 69 62 72 61 72 79 in masha.exe)

Visual C++ CRT (Offset: 56 69 73 75 61 6C 20 43 2B 2B 20 43 52 54 in masha.exe)

JPEG, MEM (Offset: 4A 50 45 47 4D 45 4D in masha.exe)

Adobe APP14 (Offset: 41 64 6F 62 65 20 41 50 50 31 34 in masha.exe)

XMS handle (Offset: 58 4D 53 20 68 61 6E 64 6C 65 in masha.exe)

GetPureName (Offset: 47 65 74 50 75 72 65 4E 61 6D 65 in masha.exe)

OggS Xiph.Org libTheora I 20040317 3 2 0 (Offset: 4F 67 67 53 00 00 00 00 58 69 70 68 2E 4F 72 67 20 6C 69 62 54 68 65 6F 72 61 20 49 20 32 30 30 34 30 33 31 37 20 33 20 32 in masha.exe)

Three thing: Resource signature failed ! VOLUME0.CFS::Init.volume%d.res (Offset: 52 65 73 6F 75 72 63 65 20 73 69 67 6E 61 74 75 72 65 20 66 61 69 6C 65 64 20 21 00 56 4F 4C 55 4D 45 30 00 43 46 53 3A 3A 49 6E 69 74 00 00 00 76 6F 6C 75 6D 65 25 64 2E 72 65 73 in masha.exe)

How Volume0.res structured be like in hex (
CString::CString
CString operator
+=CWString::CWString
CWString::Release
CWString::Init
CWString operator
=CWString operator
+=CString operator
=CString::SetLength
CInput::Update
CFS::CLockedFile::
~CLockedFile
CFS::Unlock
CFS::Unlock void
CFS::Read_3
CFS::FindDir
CFS::Read_4
id=%d
CFS::Exist
CFS::Open
ogg
anim
spline
desc
tex
lua
b
w
r
CFS::Read_1
CFS::Read_2
CFS::Lock
CFS::ScanPath/
CVS*
CFS::AddDirToFSRec
CFS::AddResourceFile)
Offset: (43 53 74 72 69 6E 67 3A 3A 43 53 74 72 69 6E 67 00 00 00 00 43 53 74 72 69 6E 67 3A 3A 6F 70 65 72 61 74 6F 72 20 2B 3D 00 00 00 00 43 57 53 74 72 69 6E 67 3A 3A 43 57 53 74 72 69 6E 67 00 00 43 57 53 74 72 69 6E 67 3A 3A 52 65 6C 65 61 73 65 00 00 00 43 57 53 74 72 69 6E 67 3A 3A 49 6E 69 74 00 00 43 57 53 74 72 69 6E 67 3A 3A 6F 70 65 72 61 74 6F 72 20 3D 00 00 00 00 43 57 53 74 72 69 6E 67 3A 3A 6F 70 65 72 61 74 6F 72 20 2B 3D 00 00 00 43 53 74 72 69 6E 67 3A 3A 6F 70 65 72 61 74 6F 72 20 3D 00 43 53 74 72 69 6E 67 3A 3A 53 65 74 4C 65 6E 67 74 68; 43 49 6E 70 75 74 3A 3A 55 70 64 61 74 65 00 00 DB 0F 49 40 43 46 53 3A 3A 43 4C 6F 63 6B 65 64 46 69 6C 65 3A 3A 7E 43 4C 6F 63 6B 65 64 46 69 6C 65 00 00 43 46 53 3A 3A 55 6E 6C 6F 63 6B 00 43 46 53 3A 3A 55 6E 6C 6F 63 6B 20 76 6F 69 64 00 00 00 00 43 46 53 3A 3A 52 65 61 64 5F 33 00 43 46 53 3A 3A 46 69 6E 64 44 69 72 00 00 00 00 43 46 53 3A 3A 52 65 61 64 5F 34 20 69 64 3D 25 64 00 00 00 43 46 53 3A 3A 45 78 69 73 74 00 00 43 46 53 3A 3A 4F 70 65 6E 00 00 00 6F 67 67 00 61 6E 69 6D 00 00 00 00 73 70 6C 69 6E 65 00 00 64 65 73 63 00 00 00 00 74 65 78 00 6C 75 61 00 62 00 00 00 77 00 00 00 72 00 00 00 43 46 53 3A 3A 52 65 61 64 5F 31 00 43 46 53 3A 3A 52 65 61 64 5F 32 00 43 46 53 3A 3A 4C 6F 63 6B 00 00 00 43 46 53 3A 3A 53 63 61 6E 50 61 74 68 00 00 00 2F 00 00 00 43 56 53 00 2A 00 00 00 43 46 53 3A 3A 41 64 64 44 69 72 54 6F 46 53 52 65 63 00 00 43 46 53 3A 3A 41 64 64 52 65 73 6F 75 72 63 65 46 69 6C 65 00 00 00 00 52 65 73 6F 75 72 63 65 20 73 69 67 6E 61 74 75 72 65 20 66 61 69 6C 65 64 20 21 00 56 4F 4C 55 4D 45 30 00 43 46 53 3A 3A 49 6E 69 74 00 00 00 76 6F 6C 75 6D 65 25 64 2E 72 65 73)