So there are some random Crash's

What I expected to happen
I clicked through the Main Menu, it should continue the game

What actually happend
Minecraft crashed

Crashreport
Client> ---- Minecraft Crash Report ----
Client> // I feel sad now
Client>
Client> Time: 19.09.13 22:53
Client> Description: Updating screen events
Client>
Client> java.lang.NullPointerException
Client> at aye.a(SourceFile:86)
Client> at aya.a(SourceFile:37)
Client> at azw.a(SourceFile:52)
Client> at azo.d(SourceFile:240)
Client> at azo.m(SourceFile:211)
Client> at awo.o(SourceFile:1260)
Client> at awo.aa(SourceFile:730)
Client> at awo.e(SourceFile:681)
Client> at net.minecraft.client.main.Main.main(SourceFile:104)
Client>
Client>
Client> A detailed walkthrough of the error, its code path and all known details is as follows:
Client> ---------------------------------------------------------------------------------------
Client>
Client> – Head –
Client> Stacktrace:
Client> at aye.a(SourceFile:86)
Client> at aya.a(SourceFile:37)
Client> at azw.a(SourceFile:52)
Client> at azo.d(SourceFile:240)
Client> at azo.m(SourceFile:211)
Client>
Client> – Affected screen –
Client> Details:
Client> Screen name: azw
Client>
Client> – Affected level –
Client> Details:
Client> Level name: MpServer
Client> All players: 1 total; [bgf['Klikla97'/23, l='MpServer', x=-158,48, y=65,62, z=237,95]]
Client> Chunk stats: MultiplayerChunkCache: 225, 225
Client> Level seed: 0
Client> Level generator: ID 01 - flat, ver 0. Features enabled: false
Client> Level generator options:
Client> Level spawn location: World: (-163,4,240), Chunk: (at 13,0,0 in -11,15; contains blocks -176,0,240 to -161,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Client> Level time: 360 game time, 360 day time
Client> Level dimension: 0
Client> Level storage version: 0x00000 - Unknown?
Client> Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Client> Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Client> Forced entities: 1 total; [bgf['Klikla97'/23, l='MpServer', x=-158,48, y=65,62, z=237,95]]
Client> Retry entities: 0 total; []
Client> Server brand: vanilla
Client> Server type: Integrated singleplayer server
Client> Stacktrace:
Client> at bga.a(SourceFile:294)
Client> at awo.b(SourceFile:1872)
Client> at awo.e(SourceFile:690)
Client> at net.minecraft.client.main.Main.main(SourceFile:104)
Client>
Client> – System Details –
Client> Details:
Client> Minecraft Version: 13w38a
Client> Operating System: Windows 7 (amd64) version 6.1
Client> Java Version: 1.7.0_25, Oracle Corporation
Client> Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Client> Memory: 214855552 bytes (204 MB) / 522452992 bytes (498 MB) up to 954466304 bytes (910 MB)
Client> JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
Client> AABB Pool Size: 18901 (1058456 bytes; 1 MB) allocated, 2 (112 bytes; 0 MB) used
Client> IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Client> Launched Version: 13w38a
Client> LWJGL: 2.9.0
Client> OpenGL: GeForce 7300 GS/PCIe/SSE2 GL version 2.1.2, NVIDIA Corporation
Client> Is Modded: Probably not. Jar signature remains and client brand is untouched.
Client> Type: Client (map_client.txt)
Client> Resource Packs: []
Client> Current Language: English (US)
Client> Profiler Position: N/A (disabled)
Client> Vec3 Pool Size: 420 (23520 bytes; 0 MB) allocated, 14 (784 bytes; 0 MB) used
Client> 2013-09-19 22:53:34 [SERVER] [INFO] Klikla97 left the game
Client> #@Unable to render embedded object: File (@# Game crashed) not found. Crash report saved to: #@!@# C:\Users\Andreas\AppData\Roaming\.minecraft\crash-reports\crash-2013-09-19_22.53.34-client.txt
Client> 2013-09-19 22:53:34 [SERVER] [INFO] Saving worlds
Client> 2013-09-19 22:53:34 [SERVER] [INFO] Saving chunks for level '13w38a'/Overworld
Client> java.io.IOException: Stream Closed
Client> at java.io.RandomAccessFile.length(Native Method)
Client> at afu.a(SourceFile:288)
Client> at afv.close(SourceFile:232)
Client> at java.util.zip.DeflaterOutputStream.close(Unknown Source)
Client> at java.io.FilterOutputStream.close(Unknown Source)
Client> at afx.a(SourceFile:144)
Client> at afx.c(SourceFile:132)
Client> at apd.b(SourceFile:30)
Client> at apd.run(SourceFile:23)
Client> at java.lang.Thread.run(Unknown Source)
Client> AL lib: (EE) alc_cleanup: 1 device not closed