Snake game in Mathematica.

snake

Module[{a, s, d, f}, RemoveScheduledTask@ScheduledTasks[];
 a[] := s = 
   If[#[[1]] == f, 
      f = RandomChoice[Complement[Tuples[Range /@ {34, 55}], #]]; #, 
      Most@#] &@PrependTo[s, s[[1]] + d]; s = {{17, 28}};
 f = {18, 28}; d = {1, 0};
 RunScheduledTask[
  If[1 <= #[[1]] <= 34 && 1 <= #[[2]] <= 55 && FreeQ[Most@s, #] &[
    s[[1]] + d], a[], 
   s = Position[
     Uncompress@
      "1:eJzt1U0OQDAQhuFKXIRLuISVI1hIrCy4f3RZiY6ZUpnFu/\
m0afTnMalu3qalDyHsbYxx3Y9lSHtrfAYiDYAAAggggBwHQAABBBBAjgMggAACyBtQk4vK\
o3IoZr574+2uskDyRuWtKFr20K6rHVXOLAMV1ojcMtXNh0DZdT+pIPu3+\
reC5IVMFXTtFt5Bb4Cq3EEKyLIT8Rd7CIAAAggggBwHQAABBBBAjgMggACqGicbMV7k", 
     1]; RemoveScheduledTask@ScheduledTasks[]], 0.3];
 EventHandler[
  Dynamic@ArrayPlot@
    SparseArray[Append[s, f] -> 1, {34, 55}], {"LeftArrowKeyDown" :> 
    If[d != {0, 1}, d = {0, -1}; If[d == {0, -1}, a[]]], 
   "RightArrowKeyDown" :> 
    If[d != {0, -1}, d = {0, 1}; If[d == {0, 1}, a[]]], 
   "UpArrowKeyDown" :> 
    If[d != {1, 0}, d = {-1, 0}; If[d == {-1, 0}, a[]]], 
   "DownArrowKeyDown" :> 
    If[d != {-1, 0}, d = {1, 0}; If[d == {1, 0}, a[]]]}]]

Excuse me what are you unpacking in line 11?

@MariaKrepko "GAME OVER" in a pixel font.

I am afraid to say that your IQ is 0; Let me elaborate:
When you are pressing the same arrow as the direction you're going, you clip through your tail.
This is because the code for doing this only runs the a[ ] method/function which does not check for tail collisions.

Sorry about the 0 IQ thing, my professor made me edit this code, and I had to figure this shit out, so I'm pretty salty.