How to overcome the error in the game Knock-Knock?

Question

Unity

Downloaded the game. When I click on "Play" an error occurs. What to do? Help.
Here is from the error logs:

Unity Player [version: Unity 4.2.1f4_4d30acc925c2]

knock.exe caused an Access Violation (0xc0000005)
  in module knock.exe at 001b:013acd88.

Error occurred at 2013-12-23_205134.
C:\Games\Knock-Knock\knock.exe, run by 12.
66% memory in use.
1024 MB physical memory [690 MB free].
2048 MB paging file [1024 MB free].
2048 MB user address space [1660 MB free].
Read from location 00000090 caused an access violation.

Context:
EDI:    0x00000000  ESI: 0x02a1e634  EAX:   0x00000000
EBX:    0x039af618  ECX: 0x02a1e634  EDX:   0x00000006
EIP:    0x013acd88  EBP: 0x0031f494  SegCs: 0x0000001b
EFlags: 0x00210246  ESP: 0x0031f484  SegSs: 0x00000023

Bytes at CS:EIP:
8b 97 90 00 00 00 2b 97 8c 00 00 00 33 db c1 fa