Crush
Custom software, Javascript, WebGL
Variable dimensions, silent 

Crush displays fragments of its own source code in realtime
on an ASCII grid.
Efficient playback is ensured by a custom JavaScript/WebGL
bitmap-text renderer that should allow for a smooth animation even
on lower-end machines.
Crush is web-app ready and can be added to a devices home-screen
for fullscreen playback.

Keys:
i  toggle info
s  toggle shading
 change scale
p  save 1 .png image
P  save 4 .png image
t  save .txt file
c  hide cursor
f  enter fullscreen

Some visual settings can be set or changed through URL parameters;
especially values for scale, fps and stretch will help adapt the project to different display sizes by adjusting character height and playback speed. 

Official page

https://crush.ertdfgcvb.xyz