When I created a new world, every time I enter, it stops responding, and every block that I mine, tree that I cut, or anything from the game doesn't work. For example, when I tried to cut a tree, none of the blocks were falling, and any other block in the game wasn't falling as entities/drops.

Game Output on 14w30c :
----------------------------------------
[18:52:06] [Client thread/INFO]: Setting user: ArmoredReaper
[18:52:06] [Client thread/INFO]: (Session ID is token:180cbc5fcc634816b16c98a08aadc409:54e437e8def948aea07f6670ff688e78)
[18:52:07] [Client thread/INFO]: LWJGL Version: 2.9.1
[18:52:08] [Client thread/INFO]: Reloading ResourceManager: Default, Simply Crafty [16x]

Starting up SoundSystem...
Initializing LWJGL OpenAL
(The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
OpenAL initialized.

[18:52:09] [Sound Library Loader/INFO]: Sound engine started
[18:52:11] [Client thread/INFO]: Created: 512x512 textures-atlas
[18:52:21] [Server thread/INFO]: Starting integrated minecraft server version 14w30c
[18:52:21] [Server thread/INFO]: Generating keypair
[18:52:21] [Server thread/INFO]: Converting map!
[18:52:21] [Server thread/INFO]: Scanning folders...
[18:52:21] [Server thread/INFO]: Total conversion count is 0
[18:52:22] [Server thread/INFO]: Preparing start region for level 0
[18:52:23] [Server thread/INFO]: Preparing spawn area: 6%
[18:52:24] [Server thread/INFO]: Preparing spawn area: 16%
[18:52:25] [Server thread/INFO]: Preparing spawn area: 28%
[18:52:26] [Server thread/INFO]: Preparing spawn area: 41%
[18:52:27] [Server thread/INFO]: Preparing spawn area: 56%
[18:52:28] [Server thread/INFO]: Preparing spawn area: 71%
[18:52:29] [Server thread/INFO]: Preparing spawn area: 88%
[18:52:30] [Server thread/INFO]: Changing view distance to 16, from 10
[18:52:30] [Server thread/INFO]: ArmoredReaper[local:E:1b88abcf] logged in with entity id 32 at (-189.5, 67.0, 210.5)
[18:52:30] [Server thread/INFO]: ArmoredReaper joined the game
[18:52:37] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 6849ms behind, skipping 136 tick(s)
[18:52:49] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2538ms behind, skipping 50 tick(s)
[18:53:01] [Client thread/FATAL]: Reported exception thrown!
u: Manually triggered debug crash
at brp.r(SourceFile:1565) ~[14w30c.jar:?]
at brp.ar(SourceFile:871) ~[14w30c.jar:?]
at brp.a(SourceFile:311) [14w30c.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:120) [14w30c.jar:?]
Caused by: java.lang.Throwable
... 4 more
---- Minecraft Crash Report ----
// Why did you do that?

Time: 29/07/14 18:53
Description: Manually triggered debug crash

java.lang.Throwable
at brp.r(SourceFile:1565)
at brp.ar(SourceFile:871)
at brp.a(SourceFile:311)
at net.minecraft.client.main.Main.main(SourceFile:120)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Stacktrace:
at ccz.a(SourceFile:308)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [cha['ArmoredReaper'/32, l='MpServer', x=-185,51, y=69,00, z=209,94]]
Chunk stats: MultiplayerChunkCache: 956, 956
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: -184,00,64,00,220,00 - World: (-184,64,220), Chunk: (at 8,4,12 in -12,13; contains blocks -192,0,208 to -177,255,223), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 486 game time, 486 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 74 total; [abp['Horse'/8, l='MpServer', x=-210,31, y=70,00, z=253,78], abp['Horse'/9, l='MpServer', x=-216,50, y=70,00, z=257,50], abp['Horse'/10, l='MpServer', x=-191,50, y=64,00, z=201,50], abp['Horse'/11, l='MpServer', x=-194,69, y=64,00, z=201,06], abp['Horse'/12, l='MpServer', x=-190,31, y=67,00, z=210,94], abp['Horse'/13, l='MpServer', x=-191,72, y=64,00, z=206,75], abp['Horse'/14, l='MpServer', x=-192,47, y=64,00, z=205,16], cha['ArmoredReaper'/32, l='MpServer', x=-185,51, y=69,00, z=209,94], afg['Skeleton'/21939, l='MpServer', x=-130,50, y=33,00, z=220,50], aea['Creeper'/8712, l='MpServer', x=-125,50, y=19,00, z=236,50], abk['Bat'/6610, l='MpServer', x=-125,74, y=21,81, z=230,29], aea['Creeper'/8951, l='MpServer', x=-130,47, y=42,00, z=254,97], aft['Zombie'/15149, l='MpServer', x=-203,50, y=26,00, z=173,50], afg['Skeleton'/21764, l='MpServer', x=-112,50, y=35,00, z=177,50], afg['Skeleton'/21762, l='MpServer', x=-112,50, y=35,00, z=178,50], afg['Skeleton'/21761, l='MpServer', x=-113,50, y=35,00, z=179,50], afg['Skeleton'/11263, l='MpServer', x=-216,69, y=20,00, z=237,19], aft['Zombie'/19798, l='MpServer', x=-204,50, y=52,00, z=227,50], afg['Skeleton'/21707, l='MpServer', x=-156,50, y=17,00, z=154,50], afg['Skeleton'/21708, l='MpServer', x=-153,09, y=18,00, z=155,41], aea['Creeper'/17892, l='MpServer', x=-242,50, y=19,00, z=199,50], aea['Creeper'/359, l='MpServer', x=-178,50, y=22,00, z=231,50], aea['Creeper'/8960, l='MpServer', x=-132,50, y=42,00, z=263,50], afo['Spider'/12857, l='MpServer', x=-180,91, y=18,00, z=203,91], aea['Creeper'/14849, l='MpServer', x=-126,50, y=36,00, z=179,50], aea['Creeper'/14848, l='MpServer', x=-129,50, y=36,00, z=177,50], aea['Creeper'/501, l='MpServer', x=-224,50, y=18,00, z=244,50], aea['Creeper'/14847, l='MpServer', x=-126,50, y=36,00, z=178,50], aea['Creeper'/14846, l='MpServer', x=-127,03, y=36,00, z=176,66], aea['Creeper'/20025, l='MpServer', x=-129,50, y=37,00, z=280,50], afg['Skeleton'/22370, l='MpServer', x=-166,50, y=20,00, z=210,50], aft['Zombie'/7037, l='MpServer', x=-213,50, y=20,00, z=221,50], abk['Bat'/824, l='MpServer', x=-180,14, y=42,34, z=181,23], abk['Bat'/4651, l='MpServer', x=-125,13, y=23,02, z=190,59], afg['Skeleton'/14535, l='MpServer', x=-130,81, y=23,00, z=164,28], aft['Zombie'/14498, l='MpServer', x=-152,50, y=17,00, z=152,50], aft['Zombie'/14499, l='MpServer', x=-154,50, y=17,00, z=154,50], abk['Bat'/6911, l='MpServer', x=-116,26, y=27,66, z=263,10], abk['Bat'/5432, l='MpServer', x=-199,23, y=54,97, z=185,21], abk['Bat'/5435, l='MpServer', x=-196,05, y=56,02, z=183,36], afg['Skeleton'/20840, l='MpServer', x=-185,50, y=17,00, z=202,50], abk['Bat'/10137, l='MpServer', x=-172,59, y=19,22, z=221,47], afg['Skeleton'/7242, l='MpServer', x=-209,50, y=16,00, z=152,50], afg['Skeleton'/7234, l='MpServer', x=-208,50, y=16,00, z=149,50], aft['Zombie'/14035, l='MpServer', x=-220,53, y=21,00, z=256,94], aft['Zombie'/14034, l='MpServer', x=-225,50, y=19,00, z=256,50], aft['Zombie'/14036, l='MpServer', x=-222,50, y=19,00, z=253,50], afg['Skeleton'/14045, l='MpServer', x=-225,50, y=19,00, z=248,50], aea['Creeper'/1644, l='MpServer', x=-111,97, y=47,00, z=199,31], aft['Zombie'/17056, l='MpServer', x=-106,50, y=12,00, z=275,50], aec['Enderman'/1653, l='MpServer', x=-112,50, y=45,00, z=196,50], aft['Zombie'/15751, l='MpServer', x=-150,50, y=30,00, z=283,50], aea['Creeper'/11474, l='MpServer', x=-129,50, y=21,00, z=192,50], aea['Creeper'/11475, l='MpServer', x=-132,50, y=21,00, z=195,50], aec['Enderman'/11511, l='MpServer', x=-125,50, y=25,00, z=257,50], aea['Creeper'/17098, l='MpServer', x=-247,50, y=19,00, z=240,50], afg['Skeleton'/17115, l='MpServer', x=-147,50, y=24,00, z=176,50], afg['Skeleton'/11271, l='MpServer', x=-219,50, y=19,00, z=228,50], afg['Skeleton'/11268, l='MpServer', x=-212,50, y=19,00, z=231,97], afg['Skeleton'/7939, l='MpServer', x=-170,88, y=30,00, z=183,50], abk['Bat'/9419, l='MpServer', x=-146,00, y=18,24, z=158,03], abk['Bat'/9418, l='MpServer', x=-147,91, y=19,04, z=160,51], aft['Zombie'/1724, l='MpServer', x=-150,50, y=15,00, z=219,50], aft['Zombie'/1721, l='MpServer', x=-146,50, y=15,00, z=224,50], abk['Bat'/5725, l='MpServer', x=-167,65, y=15,64, z=161,61], abk['Bat'/11701, l='MpServer', x=-227,53, y=23,10, z=276,41], abk['Bat'/11712, l='MpServer', x=-234,08, y=18,18, z=282,56], abk['Bat'/28837, l='MpServer', x=-139,66, y=30,78, z=273,32], abk['Bat'/28832, l='MpServer', x=-149,44, y=35,86, z=284,46], aft['Zombie'/15575, l='MpServer', x=-160,50, y=43,00, z=213,50], adh['item.tile.gravel'/24953, l='MpServer', x=-179,91, y=41,00, z=200,53], abk['Bat'/28750, l='MpServer', x=-190,25, y=21,04, z=196,67], abk['Bat'/28730, l='MpServer', x=-123,24, y=36,91, z=175,38], abk['Bat'/28731, l='MpServer', x=-118,06, y=36,00, z=175,75]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at ccz.a(SourceFile:308)
at brp.b(SourceFile:2254)
at brp.a(SourceFile:320)
at net.minecraft.client.main.Main.main(SourceFile:120)

– System Details –
Details:
Minecraft Version: 14w30c
Operating System: Mac OS X (x86_64) version 10.9.4
Java Version: 1.6.0_65, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 304616424 bytes (290 MB) / 575696896 bytes (549 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 14w30c
LWJGL: 2.9.1
OpenGL: Intel HD Graphics 4000 OpenGL Engine GL version 2.1 INTEL-8.28.30, Intel Inc.
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: [Simply Crafty [16x]]
Current Language: English (US)
Profiler Position: N/A (disabled)
#@Unable to render embedded object: File (@# Game crashed) not found. Crash report saved to: #@!@# /Users/JoaquinMontes/Library/Application Support/minecraft/crash-reports/crash-2014-07-29_18.53.01-client.txt
AL lib: (EE) alc_cleanup: 1 device not closed