Use keys W, A, S and D to move around. Dodge the red squares flying around, and don't touch the box either. The more you progress, the more the game will try to stop you. Good luck!
Thanks to user "Nrapoz" for creating most of the script, you should definitely go check out his original (Survival). Thanks for playing! Versions: V1.0 - Fixed my friend's game, and am planning to add more features. V1.1 - Changed the text location, fixed a stray still-standing square, increased red square spawn rate, decreased max red squares. V1.2 - Reset the leaderboard, and you get a dangerous surprise after score 60. Added a notice to where the red squares will appear (the notice is a pink square). Your square is smaller, spawn rate for red squares increased, max red squares decreased. V1.3 - Nerfed, once again. More dangerous surprises await at score 120 and 180. V1.3.1 - Thicker borders for less corner-camping, minor bug-fixes. V1.4 - Who even survives for 4 minutes anyways? You'll never ever see what 1.4 has to offer. >=)