I'm not sure if you really did this in 3 hours or how you did this in that timespan but this really blew me away! At first I thought it was just a unity game with an ascii shader on top of it but 16 kilobytes? Wow.
Good work!
This was actually done in less than two hours haha... About 200 lines of C++ code. Basic ray casting 3D like old Wolfenstein.
Thanks!